What's the “condition” in C interview test?

Question

Would it be possible to print Hello twice using single condition?

if  \"condition\"
  printf (\"Hello\");
else
  printf(\"World\");         


        

Answer 1

Buckle your seatbelts:

#include 
#include 

int main()
{
    jmp_buf env;

    if (!setjmp(env))
    {
        printf("if executed\n");
        longjmp(env, 1);
    }
    else
    {
        printf("else executed\n");
    }

    return 0;
}

Prints:

if executed
else executed

Is this what you mean? I doubt it, but at least it's possible. Using fork you can do it also, but the branches will run in different processes.