CODEWITHSUNDEEP
cwindow
Scoobydoo
Scoobydoo

Reputation: 37

program in C that close quickly

I'm programming in C and I download code block IDE because it's easier to use. As you know, the minimal code in C is to write: Hello World in a CMD window. When I try to launch the program via code block, it works but when I open the .exe file directly, it open and close quickly. Can someone explain me why?

#include <stdio.h> 

int main() { 
    int age = 0; 
    printf("how old are you?");
    scanf("%d", &age); 
    printf("You are %d", age); 
    getchar(); 
    return 0; 
}

Upvotes: 1

Views: 611

Answers (3)

Joseph Farah
Joseph Farah

Reputation: 2534

I am guessing your program looks something like this:

#include <stdio.h>

int main()
{
    printf("Hello, world!\n");
}

The program prints Hello, world! to the screen and then ends because it has nothing left to do.

A simple fix to this is to add the function getchar() after the printf statement. This will cause the program to wait for any user input before closing. It stands for get character.

Your new program should look like this:

#include <stdio.h>

int main()
{
    printf("Hello, world!\n");
    getchar();
}

UPDATE:

#include <stdio.h> 

int main() { 
    int age = 0; 
    printf("how old are you?\n");
    scanf("%d", &age); 
    getchar();
    printf("You are %d.\n", age); 
    getchar(); 

}

Upvotes: 1

lost_in_the_source
lost_in_the_source

Reputation: 11237

Put a getchar() as the last line of main:

int main()
{
    // code
    getchar();

    return 0;
}

Upvotes: 0

VoidStar
VoidStar

Reputation: 5421

What I think you're describing is the OS destroying the temporary command window when the program is done executing. Try opening a command window yourself, and then running your .exe from there. Alternatively, use int t; scanf("%d", &t) (or something) to keep your program from finishing, thus holding the window open

Upvotes: 1

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