BSD 4_3_Tahoe release

[unix-history] / usr / src / usr.bin / learn / dounit.c

#ifndef lint
static char sccsid[] = "@(#)dounit.c    4.3     (Berkeley)      9/11/87";
#endif not lint

#include "stdio.h"
#include "lrnref.h"

int     remind = 2;             /* to remind user of "again" and "bye" */
extern  int     noclobber;

dounit()
{
       char tbuff[100];

       if (todo == 0)
               return;
       wrong = 0;
retry:
       if (!noclobber)
               start(todo);            /* clean up play directory */
       sprintf(tbuff, "%s/%s/L%s", direct, sname, todo); /* script = lesson */
       scrin = fopen(tbuff, "r");
       if (scrin == NULL) {
               perror(tbuff);
               fprintf(stderr, "Dounit:  no lesson %s.\n", tbuff);
               wrapup(1);
       }

       copy(0, scrin);                 /* print lesson, usually */
       if (more == 0)
               return;
       copy(1, stdin);                 /* user takes over */
       if (skip)
               setdid(todo, sequence++);
       if (again || skip)              /* if "again" or "skip" */
               return;
       if (more == 0)
               return;
       copy(0, scrin);                 /* evaluate user's response */

       if (comfile >= 0)
               close(comfile);
       wait(&didok);
       didok = (status == 0);
       if (!didok) {
               wrong++;
               printf("\nSorry, that's %snot right.  Do you want to try again?  ",
                       wrong > 1 ? "still " : "");
               fflush(stdout);
               for(;;) {
                       gets(tbuff);
                       if (tbuff[0] == 'y') {
                               printf("Try the problem again.\n");
                               if (remind--) {
                                       printf("[ Whenever you want to re-read the lesson, type \"again\".\n");
                                       printf("  You can always leave learn by typing \"bye\". ]\n");
                               }
                               goto retry;
                       } else if (strcmp(tbuff, "bye") == 0) {
                               wrapup(0);
                       } else if (tbuff[0] == 'n') {
                               wrong = 0;
                               printf("\nOK.  That was lesson %s.\n", todo);
                               printf("Skipping to next lesson.\n\n");
                               fflush(stdout);
                               break;
                       } else {
                               printf("\nPlease type yes, no or bye:  ");
                               clearerr(stdin);
                               fflush(stdout);
                       }
               }
       }
       setdid(todo, sequence++);
}