#include<conio.h>
#include<stdio.h>
#include<math.h>
#include<ctype.h>
#include<stdlib.h>
main()
{
  char op;
  clrscr();
  while(1)
  {
    printf("\nTemperature plotting :\n");
    printf("\tinsert F to file :\n");
    printf("\tinsert E to edit :\n");
    printf("\tinsert X to exit :\n\n\n\n\n\n");
    op=getch();
    switch(op)
    {
      clrscr();
      case 'f':
      printf("Temperature plotting program :\n");
      printf("\tinsert E to new :\n");
      printf("\tinsert O to open :\n");
      printf("\tinsert S to save :\n");
      printf("\tinsert A to save as :\n");
      printf("\tinsert L to save all :\n\n\n\n\n\n");
      op=getch();
      switch(op)
      {
	case 'e':
	printf("new");
	break;
	case 'o':
	printf("open");
	break;
	case 's':
	printf("save");
	break;
	case 'a':
	printf("save as");
	break;
	case 'l':
	printf("save all");
	break;
      }
      break;
      case 'e':
      printf("Temperature plotting:\n");
      printf("\tinsert U to undo :\n");
      printf("\tinsert R to redo :\n\n\n\n\n");
      op=getch();
      switch(op)
      {
	case 'u':
	printf("undo");
	break;
	case 'r':
	printf("redo");
	break;
      }
      break;
      case 'x':
      exit(0);
      break;
    }
    getch();
    return 0;
  }
}