In Xcode, create yet another new project: a C Command Line Tool named Coolness.

The first program I ever wrote printed the words, “Aaron is Cool”. (I was 10 at the time.) Write that program now:

#include <stdio.h>

int main(int argc, const char * argv[])
{
    printf("Aaron is Cool\n");
    return 0;
}

Build and run the program.

Let’s suppose for a moment that you could make my 10-year-old self feel more confident if the program printed the affirmation a dozen times. How would you do that?

Here’s the dumb way:

#include <stdio.h>

int main(int argc, const char * argv[])
{
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    printf("Aaron is Cool\n");
    return 0;
}