The Question Answer Thinger

[markiemrboo]

main.c

#include <stdio.h>
#include <conio.h>

#include "qa.h"

int main(char **argv, int argc) {
struct LinkedList list;
int choice;

// zero memory
memset(&list, 0, sizeof(struct LinkedList));

       // how to use functions in qa.c
       // print a question!!!
Question("Hello World?");
       // add answers to a very simple linked list
AddAnswer(&list, "No");
AddAnswer(&list, "Yes");
AddAnswer(&list, "Grapefruit");
       // display answers in list and return the user choice. the true specifies whether to free() each answer after displaying it or not.
choice = Answer(&list, TRUE);

printf("Option %d selected\n", choice);

getch();

return 0;
}

 

qa.c

#include "qa.h"

void Question(char *msg) {
   int strLen = strlen(msg);
   int i;

   for (i = 0; i < strLen; i++)
       printf("=");

   printf("\n%s\n",msg);

   for (i = 0; i < strLen; i++)
       printf("=");
   printf("\n");
}

void AddAnswer(struct LinkedList *list, char *anAnswer) {
// pointless really, but it gives me an excuse to have linkedlist.c
AddToList(list, anAnswer);
}

int Answer(struct LinkedList *list, BOOLEAN autoFree) {
   int i, choice = 0;
   BOOLEAN choiceValid = TRUE;
   // don't use `static char *input` here if you free it at the end of the 
   // function. i'm a stupid dumb arse!!!!
   char *input = (char *)malloc(3 * sizeof(char));

   // check malloc for input buffer
   assert(input != NULL);
   memset(input, 0, 3 * sizeof(char));

   // test if the list has been initialized
   if (list->head != NULL) {
       // loop through list
       list->curr = list->head;
       i = 1;
       while (list->curr) {
           printf("%d. %s\n", i, list->curr->data);

 	if (autoFree) {
           	list->tmp = list->curr;
           }

           list->curr = list->curr->next;

 	if (autoFree) {
               if (list->tmp != NULL) {
               	free(list->tmp);
   }
           }

           i++;
       }

       printf("\n> ");

       // user choice
       do {
           if (!choiceValid) {
               printf("(Invalid) > ");
           }

           fgets(input, 3, stdin);
           choice = atoi(input);
           choiceValid = FALSE;
       } while (choice < 1 || choice > list->length);

 free(input);

       // reset list for next answers
 if (autoFree) {
           // dont free head here either, retard. it's already been free'd in the
           // while loop
       	memset(list, 0, sizeof(struct LinkedList));
       }
   } else {
       printf("ERROR: Answers haven't been initialized\n");
   }

   return choice;
}

 

qa.h

#ifndef QA_H
#define QA_H

#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <assert.h>
#include "linkedlist.h"

typedef enum {FALSE = 0, TRUE = 1} BOOLEAN;

struct Answers {
   int next;
   int max;
   char **answers;
};

void Question(char *);
int Answer(struct LinkedList *, BOOLEAN);
void AddAnswer(struct LinkedList *, char *);

#endif

 

linkedlist.c

#include "linkedlist.h"

void AddToList(struct LinkedList *list, char *data) {
   if (list->head == NULL) {
       list->head = (struct LinkedListNode *)calloc(1, sizeof(struct LinkedListNode));
       assert(list->head != NULL);

       memset(list->head, 0, sizeof(struct LinkedListNode));

       list->tail = list->head;
       list->tail->data = data;
   } else {
       list->tail->next = (struct LinkedListNode *)calloc(1, sizeof(struct LinkedListNode));
       assert(list->tail->next != NULL);

       memset(list->tail->next, 0, sizeof(struct LinkedListNode));

       list->tail = list->tail->next;
       list->tail->data = data;
   }

   list->length++;
}

 

linkedlist.h

#ifndef LINKEDLIST_H
#define LINKEDLIST_H

#include <stdio.h>
#include <assert.h>
#include <malloc.h>
#include <string.h>

struct LinkedListNode {
   char *data;
   struct LinkedListNode *next;
};

struct LinkedList {
   struct LinkedListNode *curr;
   struct LinkedListNode *head;
   struct LinkedListNode *tail;
   struct LinkedListNode *tmp;
   int length;
};

void AddToList(struct LinkedList *, char *);

#endif

 

I hate having to zero the memory to begin with, but i can't figure a way round that. Might be handy for menu's (that's what I used it for). See main() for usage..

 

Any pointers or... suggestions how to do it all better... orrr whatever, i'd appreciate it. I can't help but think it's a giant mess that just happens to work reasonably well

[Bleeble]

I don't really have any suggestions because I get lost after "Today, 10:10 PM", but I was just wondering what it does.

[Kamikaze_Badger]

Bored, are we?

[markiemrboo]

Bored, are we?

485301[/snapback]

 

A little bit! I finished Uni till September so...

 

I used the above to make simple text menus