beej05exception_and_fix.c

int main(void)
{
    int i;
    i = 2; /* assign the value 2 into the variable i */
    printf("Hello, World!  The value of i is %d, okay?\n", i);
    return 0;
}

/* this is what it returns
$ gcc beej05.c -o HelloWorld
beej05.c: In function ‘main’:
beej05.c:7:17: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]
                 printf("Hello, World!  The value of i is %d, okay?\n", i);

I believe this is identical to http://beej.us/guide/bgc/output/html/multipage/sve.html
part 3.1 second example.
His output differs from mine.
according to the guide its supposed to print:
Hello, World!  The value of i is 2, okay?

Googling for the warning shows this to be easily fixable with the include
#include <stdio.h>

gcc beej05.c -o HelloWorld
./HelloWorld
Hello, World!  The value of i is 2, okay?
*/