4.3BSD - /usr/src/usr.bin/learn/dounit.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)dounit.c	4.2	(Berkeley)	4/25/83";
   3: #endif not lint
   4: 
   5: #include "stdio.h"
   6: #include "lrnref.h"
   7: 
   8: int remind = 2;     /* to remind user of "again" and "bye" */
   9: extern  int noclobber;
  10: 
  11: dounit()
  12: {
  13:     char tbuff[100];
  14: 
  15:     if (todo == 0)
  16:         return;
  17:     wrong = 0;
  18: retry:
  19:     if (!noclobber)
  20:         start(todo);        /* clean up play directory */
  21:     sprintf(tbuff, "%s/%s/L%s", direct, sname, todo); /* script = lesson */
  22:     scrin = fopen(tbuff, "r");
  23:     if (scrin == NULL) {
  24:         perror(tbuff);
  25:         fprintf(stderr, "Dounit:  no lesson %s.\n", tbuff);
  26:         wrapup(1);
  27:     }
  28: 
  29:     copy(0, scrin);         /* print lesson, usually */
  30:     if (more == 0)
  31:         return;
  32:     copy(1, stdin);         /* user takes over */
  33:     if (skip)
  34:         setdid(todo, sequence++);
  35:     if (again || skip)      /* if "again" or "skip" */
  36:         return;
  37:     if (more == 0)
  38:         return;
  39:     copy(0, scrin);         /* evaluate user's response */
  40: 
  41:     if (comfile >= 0)
  42:         close(comfile);
  43:     wait(&didok);
  44:     didok = (status == 0);
  45:     if (!didok) {
  46:         wrong++;
  47:         printf("\nSorry, that's %snot right.  Do you want to try again?  ",
  48:             wrong > 1 ? "still " : "");
  49:         fflush(stdout);
  50:         for(;;) {
  51:             gets(tbuff);
  52:             if (tbuff[0] == 'y') {
  53:                 printf("Try the problem again.\n");
  54:                 if (remind--) {
  55:                     printf("[ Whenever you want to re-read the lesson, type \"again\".\n");
  56:                     printf("  You can always leave learn by typing \"bye\". ]\n");
  57:                 }
  58:                 goto retry;
  59:             } else if (strcmp(tbuff, "bye") == 0) {
  60:                 wrapup(0);
  61:             } else if (tbuff[0] == 'n') {
  62:                 wrong = 0;
  63:                 printf("\nOK.  That was lesson %s.\n", todo);
  64:                 printf("Skipping to next lesson.\n\n");
  65:                 fflush(stdout);
  66:                 break;
  67:             } else {
  68:                 printf("Please type yes, no or bye:  ");
  69:                 fflush(stdout);
  70:             }
  71:         }
  72:     }
  73:     setdid(todo, sequence++);
  74: }

Defined functions

Defined variables