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Idea for final project

This is a discussion on Idea for final project within the General Discussions forums, part of the Community Boards category; And one more suggestion: Instead of defining Pi, use the already available function in math.h: M_PI....

  1. #31
    Registered User Icekilla's Avatar
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    And one more suggestion: Instead of defining Pi, use the already available function in math.h: M_PI.

  2. #32
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    Quote Originally Posted by Icekilla View Post
    And one more suggestion: Instead of defining Pi, use the already available function in math.h: M_PI.
    didnt know about that. good idea!


    hmmm my compiler isnt allowing M_PI as a constant?
    Last edited by friedsandwich; 11-13-2012 at 04:12 PM.

  3. #33
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    Quote Originally Posted by Icekilla View Post
    Either way, what compiler are you using?
    Pelles c

  4. #34
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    Quote Originally Posted by Icekilla View Post
    Try something like Code::Blocks. It's much better.
    I use pelles because thats what we use at school. Wouldn't mind getting familiarized with another compiler though. Thanks for the suggestion ill try it out

  5. #35
    and the hat of wrongness Salem's Avatar
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    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  6. #36
    SAMARAS std10093's Avatar
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    Quote Originally Posted by friedsandwich View Post
    didnt know about that. good idea!


    hmmm my compiler isnt allowing M_PI as a constant?
    You have to include the math library
    Code:
    #include <math.h>
    Quote Originally Posted by Salem View Post
    @fried A way of posting at once and answering more than one quotes can be done like this :
    On the botom of every post, on the right corner there is something like a border with double quotes as its contents.If you click it a "tick" will appear on the corresponding post.You can do that for multiple posts.Then go to the last you "ticked" and click on Reply With Quote, as would do normally .Then the forum automatically will create all the quotes you ticked in one answer.You can see that every "ticked"-post is appearing on your answer-post form wrapped with QUOTE tags
    stahta01 likes this.

  7. #37
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    Quote Originally Posted by std10093 View Post
    You have to include the math library
    Code:
    #include <math.h>
    I have the math.h included......?

  8. #38
    SAMARAS std10093's Avatar
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    Can you please show me your code?

  9. #39
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    Quote Originally Posted by std10093 View Post
    Can you please show me your code?
    sure thing
    Code:
    #include <stdio.h>
    #include <math.h>
    #define PI 3.14159
    
    int main(void)
    {
    double sum, first_Num, sec_Num, third_Num, 
    diff, product, quotient, srt, area, rad1, rad2, base, height;
    int choice, 
    selection;
    do
    {
    printf("\nChoose what calculation to 
    perform\n");
    printf("\t1 - Addition\n");
    printf("\t2 - 
    Subtration\n");
    printf("\t3 - Multiplication\n");
    printf("\t4 - 
    Division\n");
    printf("\t5 - Square Root\n");
    printf("\t6 - 
    Exponents\n");
    printf("\t7 - Absolute Value\n");
    printf("\t8 - Area of 
    Shapes\n");
    printf("(Enter a zero to exit) \n");
    printf("\nMake a 
    selection: ");
    scanf("%d", &choice);
    
    switch (choice)
    {
    case 
    1: 
    {
    printf("\nEnter first number: ");
    scanf("%lf", 
    &first_Num);
    printf("Enter second number: ");
    scanf("%lf", 
    &sec_Num);
    sum = first_Num + sec_Num;
    printf("\nThe sum of %f and %f 
    is %.4f\n\n", first_Num, sec_Num, sum);
    break;
    }
    case 
    2:
    {
    printf("\nEnter first number: ");
    scanf("%lf", 
    &first_Num);
    printf("Enter second number: ");
    scanf("%lf", 
    &sec_Num);
    diff = first_Num - sec_Num;
    printf("\nThe difference of 
    %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, diff);
    break;
    }
    case 
    3:
    {
    printf("\nEnter first number: ");
    scanf("%lf", 
    &first_Num);
    printf("Enter second number: ");
    scanf("%lf", 
    &sec_Num);
    product = first_Num * sec_Num;
    printf("\nThe product of 
    %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, product);
    break;
    }
    case 
    4:
    {
    printf("\nEnter first number: ");
    scanf("%lf", 
    &first_Num);
    printf("Enter second number: ");
    scanf("%lf", 
    &sec_Num);
    quotient = first_Num / sec_Num;
    printf("\nThe quotient of 
    %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, 
    quotient);
    break;
    }
    case 5:
    {
    printf("\nEnter number: 
    ");
    scanf("%lf", &srt);
    {
                                            
    while (srt <= 0)
    {
                                                   
    printf("ERROR!! Value must be a positive number\n\n");
    printf("Enter number: 
    ");
    scanf("%lf", &srt);
    }
                                            
    
                                                   printf("\nThe square root of 
    %.4f is %.4f\n", srt, 
    sqrt(srt));
    }
                                            break;
    }
    case 
    6:
    {
    printf("\nEnter base number: ");
    scanf("%lf", 
    &first_Num);
    printf("Enter exponent: ");
    scanf("%lf", 
    &sec_Num);
    printf("\n%.4f to the power of %.4f is %.4f\n\n", first_Num, 
    sec_Num, pow(first_Num, sec_Num));
    break;
    }
    case 
    7:
    {
    printf("\nEnter number: ");
    scanf("%lf", 
    &first_Num);
    printf("\nThe absolute value of %.4f is %.4f\n\n", 
    first_Num, fabs(first_Num));
    break;
    }
    case 
    8:
    {
    do
    {
    printf("\nFIND THE AREA OF A SHAPE\n\n");
    printf("Which 
    shape?\n");
    printf("\t1 - Square\n");
    printf("\t2 - 
    Rectangle\n");
    printf("\t3 - Parallelogram\n");
    printf("\t4 - 
    Trapezoid\n");
    printf("\t5 - Circle\n");
    printf("\t6 - 
    Ellipse\n");
    printf("\t7 - Triangle\n");
    printf("\t8 - Go back to previous 
    menu\n");
    
    printf("\nMake a selection: ");
    scanf("%d", 
    &selection);
    
    switch (selection)
    {
    case 1: 
    
    {
    printf("\nArea Of A Square\n");
    printf("\nEnter length of a side of 
    the square: ");
    scanf("%lf", &first_Num);
    while (first_Num <= 
    0)
    {
    printf("ERROR!! Distance must be a positive 
    number\n\n");
    printf("Enter length of a side of the square: 
    ");
    scanf("%lf", &first_Num);
    }
    area = first_Num * 
    first_Num;
    printf("\nThe area of a square with a side of %.4f is %.4f\n\n", 
    first_Num, area);
    break;
    }
    case 2:
    {
    printf("\nArea Of A 
    Rectangle\n");
    printf("\nEnter width: ");
    scanf("%lf", 
    &first_Num);
    while (first_Num <=0)
    {
    printf("ERROR!! Distance 
    must be a positive number\n\n");
    printf("Enter width: ");
    scanf("%lf", 
    &first_Num);
    }
    printf("Enter height: ");
    scanf("%lf", 
    &sec_Num);
    while(sec_Num <= 0)
    {
    printf("ERROR!! Distance must 
    be a positive number\n\n");
    printf("Enter height: ");
    scanf("%lf", 
    &sec_Num);
    }
    area = first_Num * sec_Num;
    printf("\nThe area of a 
    rectagle with sides of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, 
    area);
    break;
    }
    case 3:
    {
    printf("\nArea Of A 
    Parallelogram");
    printf("\nEnter base: ");
    scanf("%lf", 
    &first_Num);
    while (first_Num <=0)
    {
    printf("ERROR!! Distance 
    must be a positive number\n\n");
    printf("Enter base: ");
    scanf("%lf", 
    &first_Num);
    }
    printf("\nEnter height: ");
    scanf("%lf", 
    &sec_Num);
    while(sec_Num <= 0)
    {
    printf("ERROR!! Distance must 
    be a positive number\n\n");
    printf("Enter height: ");
    scanf("%lf", 
    &sec_Num);
    }
    area = first_Num * sec_Num;
    printf("\nThe area of a 
    parallelogram with sides of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, 
    area);
    break;
    }
    case 4:
    {
    printf("\nArea Of A 
    Trapezoid");
    printf("\nEnter base-1: ");
    scanf("%lf", 
    &first_Num);
    while (first_Num <=0)
    {
    printf("ERROR!! Distance 
    must be a positive number\n\n");
    printf("Enter base-1: ");
    scanf("%lf", 
    &first_Num);
    }
    printf("\nEnter base-2: ");
    scanf("%lf", 
    &sec_Num);
    while(sec_Num <= 0)
    {
    printf("ERROR!! Distance must 
    be a positive number\n\n");
    printf("Enter base-2: ");
    scanf("%lf", 
    &sec_Num);
    }
    printf("\nEnter height: ");
    scanf("%lf", 
    &third_Num);
    while(third_Num <= 0)
    {
    printf("ERROR!! Distance 
    must be a positive number\n\n");
    printf("Enter height: ");
    scanf("%lf", 
    &third_Num);
    }
    area = (third_Num/2) * (first_Num + 
    sec_Num);
    printf("\nThe area of a trapezoid with a base-1 of %.4f, a base-2 
    %.4f, and a height of %.4f is %.4f\n\n", first_Num, sec_Num, third_Num, 
    area);
    break;
    }
    case 5:
    {
    printf("\nArea Of A 
    Circle\n");
    printf("\nEnter the radius: ");
    scanf("%lf", 
    &rad1);
    while(rad1 <= 0)
    {
    printf("ERROR!! Distance must be a 
    positive number\n\n");
    printf("Enter the radius: ");
    scanf("%lf", 
    &rad1);
    }
    area = (rad1 * rad1) * PI;
    printf("The area of a circle 
    with a radius of %.4f is %.4f\n\n", rad1, area);
    break;
    } 
    case 
    6:
    {
    printf("\nArea Of An Ellipse");
    printf("\nEnter radius-1: 
    ");
    scanf("%lf", &rad1);
    while(rad1 <= 0)
    {
    printf("ERROR!! 
    Distance must be a positive number\n\n");
    printf("Enter radius-1: 
    ");
    scanf("%lf", &rad1);
    }
    printf("\nEnter radius-2: 
    ");
    scanf("%lf", &rad2);
    while(rad2 <= 0)
    {
    printf("ERROR!! 
    Distance must be a positive number\n\n");
    printf("Enter radius-2: 
    ");
    scanf("%lf", &rad2);
    }
    area = (rad1 * rad2) * 
    PI;
    printf("The area of an ellipse with a radius-1 of %.4f and a radius-2 of 
    %.4f is %.4f", rad1, rad2, area);
    break;
    }
    case 
    7:
    {
    printf("\nArea Of A Triangle");
    printf("\nEnter base: 
    ");
    scanf("%lf", &base);
    while(base<=0)
    {
    printf("ERROR!! 
    Distance must be a positive number\n\n");
    printf("Enter base: 
    ");
    scanf("%lf", &base);
    }
    printf("Enter height: 
    ");
    scanf("%lf", &height);
    while(height<=0)
    {
    printf("ERROR!! 
    Distance must be a positive number\n\n");
    printf("Enter height: 
    ");
    scanf("%lf", &height);
    }
    area = (base * height) / 
    2;
    printf("The area of a triangle with a base of %.4f and a height of %.4f is 
    %.4f", base, height, area);
    break;
    }
    default:
    {
    if (selection 
    !=8)
    {
    printf("\nYour selection was not from the 
    menu\n");
    printf("Please try again.\n\n");
    } 
    
    break;
    }
    }
    break;
    
    }while (selection != 
    8);
    break;
    }
    default:
    { 
    if (choice != 0)
    {
    printf("\nYour 
    selection was not from the menu\n");
    printf("Please try 
    again.\n\n");
    }
    break;
    }
    }
    }
    while (choice != 0);
    return 
    (0);
    }
    I removed #define PI 3.14159 and changed my PI variables to M_PI and it didn't allow it as a constant,

  10. #40
    and the hat of wrongness Salem's Avatar
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    400+ lines of unindented code - no thanks!

    Here, read this
    SourceForge.net: Indentation - cpwiki
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  11. #41
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    Quote Originally Posted by Salem View Post
    400+ lines of unindented code - no thanks!

    Here, read this
    SourceForge.net: Indentation - cpwiki
    oh geez, sorry that my formatting was messed up while pulling this code of my gmail drive.....
    Code:
    #include <stdio.h> 
    #include <math.h> 
    #define PI 3.14159 
     
    int main(void) 
    { 
    double sum, first_Num, sec_Num, third_Num, diff, product, quotient, srt, area, rad1, rad2, base, height; 
    int choice, selection; 
            do 
            { 
                    printf("\nChoose what calculation to perform\n"); 
                    printf("\t1 - Addition\n"); 
                    printf("\t2 - Subtration\n"); 
                    printf("\t3 - Multiplication\n"); 
                    printf("\t4 - Division\n"); 
                    printf("\t5 - Square Root\n"); 
                    printf("\t6 - Exponents\n"); 
                    printf("\t7 - Absolute Value\n"); 
                    printf("\t8 - Area of Shapes\n"); 
                    printf("(Enter a zero to exit) \n"); 
                    printf("\nMake a selection: "); 
                    scanf("%d", &choice); 
     
                    switch (choice) 
                    { 
                            case 1:  
                            { 
                                    printf("\nEnter first number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("Enter second number: "); 
                                    scanf("%lf", &sec_Num); 
                                    sum = first_Num + sec_Num; 
                                    printf("\nThe sum of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, sum); 
                                    break; 
                            } 
                            case 2: 
                            { 
                                    printf("\nEnter first number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("Enter second number: "); 
                                    scanf("%lf", &sec_Num); 
                                    diff = first_Num - sec_Num; 
                                    printf("\nThe difference of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, diff); 
                                    break; 
                            } 
                            case 3: 
                            { 
                                    printf("\nEnter first number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("Enter second number: "); 
                                    scanf("%lf", &sec_Num); 
                                    product = first_Num * sec_Num; 
                                    printf("\nThe product of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, product); 
                                    break; 
                            } 
                            case 4: 
                            { 
                                    printf("\nEnter first number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("Enter second number: "); 
                                    scanf("%lf", &sec_Num); 
                                    quotient = first_Num / sec_Num; 
                                    printf("\nThe quotient of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, quotient); 
                                    break; 
                            } 
                            case 5: 
                            { 
                                    printf("\nEnter number: "); 
                                    scanf("%lf", &srt); 
                                    { 
                                            while (srt <= 0) 
                                                    { 
                                                   printf("ERROR!! Value must be a positive number\n\n"); 
                                                            printf("Enter number: "); 
                                                            scanf("%lf", &srt); 
                                                    } 
                                             
                                                   printf("\nThe square root of %.4f is %.4f\n", srt, sqrt(srt)); 
                                    } 
                                            break; 
                            } 
                            case 6: 
                            { 
                                    printf("\nEnter base number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("Enter exponent: "); 
                                    scanf("%lf", &sec_Num); 
                                    printf("\n%.4f to the power of %.4f is %.4f\n\n", first_Num, sec_Num, pow(first_Num, sec_Num)); 
                                    break; 
                            } 
                            case 7: 
                            { 
                                    printf("\nEnter number: "); 
                                    scanf("%lf", &first_Num); 
                                    printf("\nThe absolute value of %.4f is %.4f\n\n", first_Num, fabs(first_Num)); 
                                    break; 
                            } 
                            case 8: 
                            { 
                                    do 
                                    { 
                                            printf("\nFIND THE AREA OF A SHAPE\n\n"); 
                                            printf("Which shape?\n"); 
                                            printf("\t1 - Square\n"); 
                                            printf("\t2 - Rectangle\n"); 
                                            printf("\t3 - Parallelogram\n"); 
                                            printf("\t4 - Trapezoid\n"); 
                                            printf("\t5 - Circle\n"); 
                                            printf("\t6 - Ellipse\n"); 
                                            printf("\t7 - Triangle\n"); 
                                            printf("\t8 - Go back to previous menu\n"); 
                                             
                                            printf("\nMake a selection: "); 
                                            scanf("%d", &selection); 
                                                     
                                                    switch (selection) 
                                                    { 
                                                            case 1:  
                                                            { 
                                                                    printf("\nArea Of A Square\n"); 
                                                                    printf("\nEnter length of a side of the square: "); 
                                                                    scanf("%lf", &first_Num); 
                                                                    while (first_Num <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter length of a side of the square: "); 
                                                                            scanf("%lf", &first_Num); 
                                                                    } 
                                                                    area = first_Num * first_Num; 
                                                                    printf("\nThe area of a square with a side of %.4f is %.4f\n\n", first_Num, area); 
                                                                    break; 
                                                            } 
                                                            case 2: 
                                                            { 
                                                                    printf("\nArea Of A Rectangle\n"); 
                                                                    printf("\nEnter width: "); 
                                                                    scanf("%lf", &first_Num); 
                                                                    while (first_Num <=0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter width: "); 
                                                                            scanf("%lf", &first_Num); 
                                                                    } 
                                                                    printf("Enter height: "); 
                                                                    scanf("%lf", &sec_Num); 
                                                                    while(sec_Num <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter height: "); 
                                                                            scanf("%lf", &sec_Num); 
                                                                    } 
                                                                    area = first_Num * sec_Num; 
                                                                    printf("\nThe area of a rectagle with sides of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, area); 
                                                                    break; 
                                                            } 
                                                            case 3: 
                                                            { 
                                                                    printf("\nArea Of A Parallelogram"); 
                                                                    printf("\nEnter base: "); 
                                                                    scanf("%lf", &first_Num); 
                                                                    while (first_Num <=0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter base: "); 
                                                                            scanf("%lf", &first_Num); 
                                                                    } 
                                                                    printf("\nEnter height: "); 
                                                                    scanf("%lf", &sec_Num); 
                                                                    while(sec_Num <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter height: "); 
                                                                            scanf("%lf", &sec_Num); 
                                                                    } 
                                                                    area = first_Num * sec_Num; 
                                                                    printf("\nThe area of a parallelogram with sides of %.4f and %.4f is %.4f\n\n", first_Num, sec_Num, area); 
                                                                    break; 
                                                            } 
                                                            case 4: 
                                                            { 
                                                                    printf("\nArea Of A Trapezoid"); 
                                                                    printf("\nEnter base-1: "); 
                                                                    scanf("%lf", &first_Num); 
                                                                    while (first_Num <=0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter base-1: "); 
                                                                            scanf("%lf", &first_Num); 
                                                                    } 
                                                                    printf("\nEnter base-2: "); 
                                                                    scanf("%lf", &sec_Num); 
                                                                    while(sec_Num <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter base-2: "); 
                                                                            scanf("%lf", &sec_Num); 
                                                                    } 
                                                                    printf("\nEnter height: "); 
                                                                    scanf("%lf", &third_Num); 
                                                                    while(third_Num <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter height: "); 
                                                                            scanf("%lf", &third_Num); 
                                                                    } 
                                                                    area = (third_Num/2) * (first_Num + sec_Num); 
                                                                    printf("\nThe area of a trapezoid with a base-1 of %.4f, a base-2 %.4f, and a height of %.4f is %.4f\n\n", first_Num, sec_Num, third_Num, area); 
                                                                    break; 
                                                            } 
                                                            case 5: 
                                                            { 
                                                                    printf("\nArea Of A Circle\n"); 
                                                                    printf("\nEnter the radius: "); 
                                                                    scanf("%lf", &rad1); 
                                                                    while(rad1 <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter the radius: "); 
                                                                            scanf("%lf", &rad1); 
                                                                    } 
                                                                    area = (rad1 * rad1) * PI; 
                                                                    printf("The area of a circle with a radius of %.4f is %.4f\n\n", rad1, area); 
                                                                    break; 
                                                            }  
                                                            case 6: 
                                                            { 
                                                                    printf("\nArea Of An Ellipse"); 
                                                                    printf("\nEnter radius-1: "); 
                                                                    scanf("%lf", &rad1); 
                                                                    while(rad1 <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter radius-1: "); 
                                                                            scanf("%lf", &rad1); 
                                                                    } 
                                                                    printf("\nEnter radius-2: "); 
                                                                    scanf("%lf", &rad2); 
                                                                    while(rad2 <= 0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter radius-2: "); 
                                                                            scanf("%lf", &rad2); 
                                                                    } 
                                                                    area = (rad1 * rad2) * PI; 
                                                                    printf("The area of an ellipse with a radius-1 of %.4f and a radius-2 of %.4f is %.4f", rad1, rad2, area); 
                                                                    break; 
                                                            } 
                                                            case 7: 
                                                            { 
                                                                    printf("\nArea Of A Triangle"); 
                                                                    printf("\nEnter base: "); 
                                                                    scanf("%lf", &base); 
                                                                    while(base<=0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter base: "); 
                                                                            scanf("%lf", &base); 
                                                                    } 
                                                                    printf("Enter height: "); 
                                                                    scanf("%lf", &height); 
                                                                    while(height<=0) 
                                                                    { 
                                                                            printf("ERROR!! Distance must be a positive number\n\n"); 
                                                                            printf("Enter height: "); 
                                                                            scanf("%lf", &height); 
                                                                    } 
                                                                    area = (base * height) / 2; 
                                                                    printf("The area of a triangle with a base of %.4f and a height of %.4f is %.4f", base, height, area); 
                                                                    break; 
                                                            } 
                                                            default: 
                                                            { 
                                                                    if (selection !=8) 
                                                                    { 
                                                                            printf("\nYour selection was not from the menu\n"); 
                                                                            printf("Please try again.\n\n"); 
                                                                    }  
                                                                    break; 
                                                            } 
                                                    } 
                                                    break; 
     
                                            } 
     
                                    while (selection != 8); 
                             
                            } 
                            default: 
                            {        
                                    if (choice != 0) 
                                    { 
                                            printf("\nYour selection was not from the menu\n"); 
                                            printf("Please try again.\n\n"); 
                                    } 
                                    break; 
                            } 
                    } 
            } 
            while (choice != 0); 
    return (0); 
    }
    happy?

  12. #42
    SAMARAS std10093's Avatar
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    Nice, France
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    Quote Originally Posted by Salem View Post
    400+ lines of unindented code - no thanks!

    Here, read this
    SourceForge.net: Indentation - cpwiki
    I would like to add something to this ,which obviously finds me in an agreement.

    Friendly tip : You have an error.Everybody has been into a situation like that
    So how to help us help you.Post the code that has the error!Not the code that you had before the error.Report what the compiler says.Copy paste the messages he sends to you!

    Moreover posting all the code of yours might be not a must. To be more clear, posting your whole code should the last thing to do.
    The ideal thing to do is to post as few lines of code as possible to fully describe your problem.
    This of course takes some experience, but you have to get yourself thinking like this...
    Example
    Assume that you are into a situation that your compiler throws an error of undefined variable in a large program..
    You want to post , because after trying to solve it yourself multiple times, you didn't succeed it.What you should do?Post the whole code?
    No, try to isolate the error .Also post the error message too.

    Code:
    #include <stdio.h>
    
    int main(void)
    {
        char buf[10];
        int i;
    
        printf("Please type an alpharithmetic input\n");
        fgets(bof , 10 , stdin);
        .....
        /* 64387648367 lines of code */
        return 0;
    }
    The error
    Code:
    Macintosh-c8bcc88e5669-9:~ usi$ gcc -Wall px.c -o px
    px.c: In function ‘main’:
    px.c:9: error: ‘bof’ undeclared (first use in this function)
    px.c:9: error: (Each undeclared identifier is reported only once
    px.c:9: error: for each function it appears in.)
    Wasn't it better that i isolated the problematic code from the rest of my huge program?
    Of course it is not so simple as that every time , but i think you got my point

    EDIT : We answered the same time.Read my post too and think twice of what you should post

  13. #43
    and the hat of wrongness Salem's Avatar
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    Not particularly, you've used some pre-coloured code, and in doing so, suppressed the boards ability to line number the code for you.
    Can you do "paste as text" in future.

    > printf("\nFIND THE AREA OF A SHAPE\n\n");
    FWIW, all of this code should be reduced to
    Code:
    case 8:
    {
        doShapeAreas();
        break;
    }
    And all 8 cases which make up the area calculations moved into a new function along the lines of
    Code:
    void doShapeAreas ( void ) {
        do 
        { 
            printf("\nFIND THE AREA OF A SHAPE\n\n"); 
            printf("Which shape?\n"); 
            printf("\t1 - Square\n"); 
            printf("\t2 - Rectangle\n"); 
            printf("\t3 - Parallelogram\n"); 
            printf("\t4 - Trapezoid\n"); 
            printf("\t5 - Circle\n"); 
            printf("\t6 - Ellipse\n"); 
            printf("\t7 - Triangle\n"); 
            printf("\t8 - Go back to previous menu\n"); 
                
            printf("\nMake a selection: "); 
            scanf("%d", &selection); 
                        
            switch (selection) 
            { 
                case 1:  
            // and so on 
        } while ( selection != 8 );
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  14. #44
    Registered User
    Join Date
    Nov 2012
    Posts
    35
    there is no error and my areas work fine. the only problem was when i tried to use the M_PI in place of my defined PI value, which isn't a big deal anyways. my teacher wants me to write my own code and algorithms and not just use what is included in the math.h header file, there is no problem here. it might be a longer code that i can probably condense but memory is not an issue here.

    i would have placed just a few lines of code but you asked to see my code, you did not specify what you wanted to see so i gave it all to you. my main goal from where my code is now, to where i would want it to be is being able to input a string of characters (i.e. 2+5/2*8 + (2-5) ) and be able to solve. the problem i am having with that code is i cant seem to convert from a char* to int or double.
    Code:
    #include<stdio.h>
    #include<math.h>
    #include <stdlib.h>
    #include <string.h>
    int indexOf(char input[],char search)
    {
    	int d;
    	int index = -1;
    	for(d=0;d<strlen(input) && index==-1;d++)
    	{
    		if(input[d]==search)
    			index = d;
    	}
    	return index;
    }
    
    
    int twoVariableExecution(char input[])
    {
    	int d;
    	char operation = '-';
    	int operand_index = -1;
    	int plus_index = indexOf(input,'+');
    	int sub_index = indexOf(input,'-');
    	int mul_index = indexOf(input,'*');
    	if(plus_index > -1)
    	{
    		operation = 'A';
    		operand_index = plus_index;
    	}
    	else if(sub_index > -1)
    	{
    		operation = 'S';
    		operand_index = sub_index;
    	}
    	else if(mul_index > -1)
    	{
    		operation = 'M';
    		operand_index = mul_index;
    	}
    
    
    	char first[operand_index-1];
    	memcpy(first,input,operand_index);
    	char second[55];
    	memcpy(second,input + (operand_index+1),(strlen(input)-operand_index));
    
    
    	double dbl_second;
    	double dbl_first;
    	dbl_first = first;
    	dbl_second = second;
    
    
    	printf("first is %e and second is %e", dbl_first, dbl_second);
    
    
    	switch(operation)
    	{
    		case 'A':
    			printf("you chose addition jackass");
    			break;
    		case 'S':
    			printf("you chose subtraction jackass");
    			break;
    		case 'M':
    			break;
    	}
    	return(1);
    }
    int main(void){
    	char user_input[255];
    	printf("Print yoru equation:");
    	scanf("%s",user_input);
    	printf("\nyour chosen equation was: %d\n",twoVariableExecution(user_input));
    	printf("%d",indexOf("........ you",'u'));
    	return(0);
    }


    Last edited by friedsandwich; 11-15-2012 at 01:06 PM.

  15. #45
    SAMARAS std10093's Avatar
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    About the char* you said, take a look at the last post here..Read the fgets and atoi part

    Yes i agree that for your code, using your own defined π is not a problem.However where you have the problem with the M_PI is not at all visible by me, because you did not post the code where you get the relative error

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