a strange problem, hard to solve too

This is a discussion on a strange problem, hard to solve too within the C Programming forums, part of the General Programming Boards category; hi everyone, i'm a new computer engineer and C is among the beginning courses. anyway i put the first program ...

  1. #1
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    Angry a strange problem, hard to solve too

    hi everyone,
    i'm a new computer engineer and C is among the beginning courses.
    anyway i put the first program source code in my software which is "dev c++ version 4.9.9.2" under windows pro 5.1
    the source is:
    Code:
    #include<stdio.h>
    main()
    { 
          printf(" hello world");
          return(0);
    }
    the problem is that when i run this program
    it opens and closes quickly like a flash so i couldn't look at what is written in it.
    please help me as soon as possible. thanks a lot

  2. #2

  3. #3
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    Sure is a tough one to solve.

  4. #4
    Or working on it anyways mramazing's Avatar
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    dude... the program already ran, run it in DOS and you will see, or put something like
    Code:
    #include <stdio.h>
    #include <stdlib.h>
    
    int main()
    {
         printf("hello world\n");
         system("pause");
         return (0);
    }
    try that and you will be able to see the words
    -- Will you show me how to c++?

  5. #5
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    "hard to solve" sure got my attention.

    i had the exact same problem when i first looked into c.

  6. #6
    Matt Conway bobthebullet990's Avatar
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    yes... and me also!!! i remember that problem!!! ...a simple scanf() sorts it out! ...either that or just run it on linux and output is on the shell!!! far easier!
    Many junglists take pride in their belongin to what may be referred to as a globalised drum & bass subculture, as a subculture though, it is not nearly as distinct at gothic or punk!

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    thanks a lot friends but how can we do that if we have a program that holds "if" statments wouldn't be harder work or it's going to be a simple stuff

  8. #8
    Registered User ssharish2005's Avatar
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    why making it so complicated. just place a standard function getchar before the return statment. It just solves the problem. Look the sample code

    Code:
    #include <stdio.h>
    
    int main()
    {
        printf("Hello World\n");
        
        getchar();
        return 0;
    }
    And read the FAQ. About this. And system("PAUSE"); Wouldn't be a good idea cos it has to trap to OS and it not portable. Works only on windows machince and take too much processing time.

    ssharish2005

  9. #9
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    thanks a lot friends and experts i'm very happy to be a part of this science community. anyway
    this is a code that i have made
    Code:
    #include<stdio.h>
    #include<math.h>
    #include<stdlib.h>
    main(void)
    {
          double a,b,c,d,X1,X2;
          printf(" this program can solve equations of degree two");
          printf("\n this kind of equations has this format ax˛+bx+c=0");
          printf("\n so you have to know the entegers a,b,c before the beginning");
          printf("\n please enter the digit a:");
          scanf("%lf",&a);
          printf("\n please enter the digit b:");
          scanf("%lf",&b);
          printf("\n please enter the digit c:");
          scanf("%lf",&c);
          d = (b*b)-(4*a*c);
          printf(" this is delta of the equation: %f",d); 
    
          if (d < 0);
          printf("\nthis equation doesn't have any solution\n");
          system("pause");
          if(d > 0);
          printf("\nthis equation accept a solution\n");
          X1=(-b-(sqrt(d)))/(2*a);
          X2=(-b+(sqrt(d)))/(2*a);
          system("pause");
          printf("The solution is X1=%f and X2=%f",X1,X2);
          system("pause");
    this is the code please help me editing it. thanks a lot

  10. #10
    Registered User ssharish2005's Avatar
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    Code:
    #include<stdio.h>
    #include<math.h>
    #include<stdlib.h>
    
    int main()
    {
          double a,b,c,d,X1,X2;
          
          printf(" this program can solve equations of degree two");
          printf("\n this kind of equations has this format ax&#178;+bx+c=0");
          printf("\n so you have to know the entegers a,b,c before the beginning");
          printf("\n please enter the digit a:");
          scanf("%lf",&a);
          
          printf("\n please enter the digit b:");
          scanf("%lf",&b);
          
          printf("\n please enter the digit c:");
          scanf("%lf",&c);
          d = (b*b)-(4*a*c);
          
          printf(" this is delta of the equation: %f",d); 
    
          if (d < 0)
          {
                printf("\nthis equation doesn't have any solution\n");
                getchar();
          } 
             
          if(d > 0)
          {
                printf("\nthis equation accept a solution\n");
                X1=(-b-(sqrt(d)))/(2.0*a);
                X2=(-b+(sqrt(d)))/(2.0*a);
                printf("The solution is X1=%f and X2=%f",X1,X2);
                getchar();
          }    
    
          return 0;
    }
    Point out the differeces and post again

    ssharish2005

  11. #11
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    thanks a lot a lot a lot now i can program thank you friends.


    NB: you forgot to put the function getchar(); after the first ""printf(" this is delta of the equation: %f",d); "" i mean before the first if

  12. #12
    CSharpener vart's Avatar
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    a,b,c are numbers not digits

    getchar(); better take out of the if - put just before return

    when d ==0 where is just 1 root

    "a" should be cheched to be not 0 - other wise you get the crash
    The first 90% of a project takes 90% of the time,
    the last 10% takes the other 90% of the time.

  13. #13
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    thanks a lot

  14. #14
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    Quote Originally Posted by ssharish2005
    why making it so complicated. just place a standard function getchar before the return statment. It just solves the problem. Look the sample code

    Code:
    #include <stdio.h>
    
    int main()
    {
        printf("Hello World\n");
        
        getchar();
        return 0;
    }
    And read the FAQ. About this. And system("PAUSE"); Wouldn't be a good idea cos it has to trap to OS and it not portable. Works only on windows machince and take too much processing time.

    ssharish2005
    dont make suggestions about making the program wait. If you are developing a console program on MSVC for instance you fire up the program and it adds the wait for you. So when adding a manual wait you got 2 waits suddenly. Just fire up the damn program from a console!

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