Question

When I run this code the program freezes,why?

main()
{
int co;
    co=0;
    while (co<10) {

        co=co+1;

        if (co==3)
            printf("The number is now three.");
        if (co==7)
            printf("The number is now seven.");
        else
            printf(co);

}
}

I’m compiling it with mingw GCC.

Answer 1

You can’t print co like that:

You need to do it like this:

printf("%d",co);

printf takes as a first parameter, a string with format specifiers. The latter (optional) parameters are the arguments themselves.

http://www.cplusplus.com/reference/clibrary/cstdio/printf/

Here’s a more cleaned version of your code:

int main(){

    int co = 0;
    while (co < 10) {

        co = co + 1;

        if (co == 3)
            printf("The number is now three.");
        if (co == 7)
            printf("The number is now seven.");
        else
            printf("%d\n",co);
    }

    return 0;
}