#include <stdio.h>		/* Pre-processor directive */

int main()			/* main function, start of program */
{
  int year = 2006;		// a integer variable declaration
  char entry;			// a character variable

  printf("Welcome to C Programming, Summer %d\n", year);
  printf("Enter 'x' to quit: ");
  scanf("%c", &entry);		// read input from user

  printf("Goodbye!\n");

  return 0;			// return value to operating system
}