Hello, world!

Discuss the following features of the sample program from lectures:

// Prints out a friendly message.
// Andrew Bennett <andrew.bennett@unsw.edu.au>
// 2017-07-24

#include <stdio.h>
#include <stdlib.h>

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

    // Print out the famous 'hello world' message.
    printf ("Hello, world!\n");

    return EXIT_SUCCESS;
}

• What is the purpose of the \n in "Hello, world!\n"?
• Comments:
  • When can we use comments?
  • What do comments tell us?
  • What makes a good comment?
  • How do comments improve program style?
• Indenting and white-space:
  • What is indented in the sample program?
  • Suggest why.