Menu: Difference between revisions

Content added Content deleted

Inline

@@ Line 64: / Line 64: @@
 #include <string.h>
+char *menu_select(char **items, char *prompt);
+int
-const char *menu_select(const char **items, const char *prompt)
+main(void)
 {
+	char *items[] = {"fee fie", "huff and puff", "mirror mirror", "tick tock", NULL};
-  int i, nchoices;
+	char *prompt = "Which is from the three pigs?";
-  int choice;
+	printf("You chose %s.\n", menu_select(items, prompt));
-  if (items==NULL) return NULL;
-  while(1) {
-    for(i=0; items[i] != NULL; i++) {
-      printf("%d) %s\n", i+1, items[i]);
-    }
-    nchoices = i;
-    if ( prompt != NULL )
-      printf("%s ", prompt);
-    else
-      printf("Choice? ");
-    scanf("%d", &choice);
-    if ( (choice > 0) && (choice <= nchoices) ) break;
-    printf("Choose from 1 to %d\n\n", nchoices);
-  }
-  return items[choice-1];
-}</lang>
+	return EXIT_SUCCESS;
-<lang c>const char *menu[] = {
+}
-  "fee fie", "huff and puff", "mirror mirror", "tick tock", NULL
-};
+char *
-int main()
+menu_select(char **items, char *prompt)
 {
+	char buf[BUFSIZ];
-  printf("You chose: %s\n", menu_select(menu, "Which is from the three pigs?"));
+	int i;
-  return EXIT_SUCCESS;
+	int choice;
+	int choice_max;
+	if (items == NULL)
+		return NULL;
+	do {
+		for (i = 0; items[i] != NULL; i++) {
+			printf("%d) %s\n", i + 1, items[i]);
+		}
+		choice_max = i;
+		if (prompt != NULL)
+			printf("%s ", prompt);
+		else
+			printf("Choice? ");
+		if (fgets(buf, sizeof(buf), stdin) != NULL) {
+			choice = atoi(buf);
+		}
+	} while (1 > choice || choice > choice_max);
+	return items[choice - 1];
 }</lang>