Objective-C Programming: The Big Nerd Ranch Guide

How do I write and use a function?

Now that you have realized that you need a function, you need to write one. Open main.c in your ClassCertificates project and write a new function named congratulateStudent. This function should go just before main() in the file.

#include <stdio.h>

void congratulateStudent(char *student, char *course, int numDays)
{
    printf("%s has done as much %s Programming as I could fit into %d days.\n",
         student, course, numDays);
}

int main(int argc, const char * argv[])
{
   ...

(Wondering what the %s and %d mean? Puzzled by the type char *? Hold on for now; we will get there.)

Now edit main() to use your new function:

int main (int argc, const char * argv[])
{
    congratulateStudent("Kate", "Cocoa", 5);
    congratulateStudent("Bo", ...