/* BUG ZONE!!!
Example: if statement */

#include <stdio.h>

main()
{
  int dialled = 123;
  
  printf("You dialled %i\n", dialled);
  
  if (dialled == 999);  /* BUG */
    puts("Emergency services.");
    puts("Which service do you require?");  /* BUG */
    puts("Police, ambulance, fire or coastguard?");
}