#include <stdio.h>


#define INIT 0
#define TAK 1
#define NAV 2
#define NAE 3
#define NAA 4
#define LAN 5

int main()
{
  int state = INIT;
  char ch;
  char junk;  
  printf (" Mission Impossible 6 \a\a\a\a\a\a\n");
  while (state != 5)
    {
      switch (state)
	{
	case INIT: { printf("Ready for the mission (y or n)? \n");
	    scanf("%c%c",&ch, &junk);
                    if (ch == 'y') state = TAK; } break;

        case TAK:  { printf(" Taking off \n"); 
	    printf(" Mission assigned (y or n)? \n");
	    scanf("%c%c",&ch, &junk);


                if (ch == 'y') state = NAV; } break;

	case NAV:   {printf(" Navigating \n"); 
	             printf(" Target detected (y or n)? \n");
	    scanf("%c%c",&ch, &junk);


                if (ch == 'y') state = NAE; 
                else 
                  {printf(" Mission Completed (y or n)?\n");
	    scanf("%c%c",&ch, &junk);


                  if (ch == 'y') state = LAN;
		  }
		} break;

	case NAE: {printf(" Navigating and Evading \n");
	           printf(" Locked In (y or n)? \n");
	    scanf("%c%c",&ch, &junk);


               if (ch == 'y') state = NAA; } break;

	case NAA:{ printf(" Navigating and Attacking \n"); 
	    printf(" Enemy Destroyed (y or n)? \n");
	    scanf("%c%c",&ch, &junk);

                if (ch == 'y') state = NAV;
                else state = NAE; } break;

        }
      }
  printf(" Mission Accomplished \a\a\a\a\a\a\a\a\n");
  return 0;
}