Thread: urgent need hlp..i'm develop a math quiz program thy was several error

Originally Posted by algorism

Originally Posted by Horror

For input streams, fflush() discards any buffered data that has been fetched from the underlying file, but has not been consumed by the application.

You pulled that out of your ass. Windows works that way, but linux doesn't.

The quoted line from Horror is from the fflush man-page of linux.
But this doesn't mean stdin, because stdin have no input buffer.
That was Horror assume as input buffer is in real the output buffer from the console.
The example from algorism show that.
I have tested it with files that was opened for reading, but nothing changes.
I think, this means buffers from network connections or serial line.

Two problems:

Code:

...
        void addMedium(); {
            printf("That's a bit harder\n");
        }


        void addDifficult(); {
            printf("That's really tricky\n");
        }

    }  // Close of addEasy()

1) You define both these functions inside addEasy(). You cannot define a function inside another function!

2) Note the semicolons between the closing paren, and the opening curly brace for both functions! They should not be there!

Code:

        void addMedium(); {  //!! what's this ; doing?
            printf("That's a bit harder\n");
        }
 
 
        void addDifficult(); {  //!! what's this ; doing?
            printf("That's really tricky\n");
        }

Your indentation is poor, it's hard to see where addEasy() actually ends.
Indent style - Wikipedia

Code:

         #include<stdio.h>#include<stdlib.h>
#include<math.h>
#include<time.h>
#pragma warning(disable:4996)


int menu();
void additionmenu();
void subtractionmenu();
void multiplicationmenu();
void addEasy();
void addMedium();
void addDifficult();


int main()
{
    int choice = menu();
    printf("You have selected the choice %d", choice);


    if (choice == 1)
    {
        printf("You have selected addition\n");
        additionmenu();
    }
    else if (choice == 2)
    {
        printf("You have selected subtraction\n");
        subtractionmenu();
    }
    else if (choice == 3)
    {
        printf("You have selected multiplication\n");
        multiplicationmenu();
    }
    else
    {
        printf("Invalid choice\n");
    }
    system("pause");
}


int menu()
{
    int choice;
    printf("1.addition\n");
    printf("2.subtraction\n");
    printf("3.multiplication\n");
    printf("Please choose either 1,2 or 3:\n");
    scanf("%d", &choice);
    (getchar() != '\n');
    return choice;
}


void additionmenu()
{
    char choice;
    printf("Please select the level\n");
    printf("A level 1\n");
    printf("B level 2\n");
    printf("C level 3\n");
    scanf("%c", &choice);
    if (choice == 'A' || choice == 'a')
    {
        printf("You have selected level 1\n");
        addEasy();
    }
    else if (choice == 'B' || choice == 'b')
    {
        printf("You have selected level 2\n");
        addMedium();
    }
    else if (choice == 'C' || choice == 'c')
    {
        printf("You have selected level 3\n");
        addDifficult();
    }
    else
    {
        printf("Invalid choice\n");


    }
}




void subtractionmenu() {
    printf("To Do\n");
}


void multiplicationmenu() {
    printf("To Do\n");
}


void addEasy() {








    int n1, n2, pcans, userans;
    int count = 1, mark = 0;
    char choice;
    printf("Welcome to addition level 1\n");


    do {
        srand((unsigned int)time(NULL));
        n1 = rand() % 10;
        n2 = rand() % 10;
        pcans = n1 + n2;


        printf("%d.%d+%d>", count, n1, n2);
        scanf("%d", &userans);
        if
            (userans == pcans) {
            printf("You are right\n");
            mark = mark + 10;
        }
        else
        {
            printf("You are wrong\n");
        }
        count++;
    } while (count <= 10);
    system("pause");
    system("cls");
    printf("Your score is %d", mark);
    rewind(stdin);
    if (mark >= 80)
    {
        printf("Congratulation!!! you pass level1！！\n");
        printf("Do you want move to next level?(Y/N)\n");
        scanf("%c", &choice);
        switch (choice)
        {
        case'Y':
        case'y': {printf("addMedium)()");
            break; }
        case'N':
        case'n': {system("exit");
            break; }
        default:
        {     printf("Invalid!!\n");
        printf("You are back to main menu.\n");
        system("pause");
        additionmenu();
        }
        }






    }

so this should be like this right?

Did you compile it with the highest warning level? Did you see any warnings or errors after compiling? Did you attempt to run it after compiling? Would this answer your question?

If so, you would know you have just deleted the two function definitions, rather than moving them outside the other function, and simply removing the two semicolons.

EDIT: Also, please remove all the extraneous blank lines from the code. One line rather than 10 will do the job.

EDIT2: PLEASE remove the following line from your code!!! YOU WANT to see ALL warnings and errors!!!

Code:

#pragma warning(disable:4996)