Thread: deqeue

M.BM has number of items in inventory, and Q.front->BM has number of items user wants. After run this function M.BM should subtract number of items that user wants.
but, after run this function my inventory stays same.

also, when I enqueue ABC and 2, the function nextline() prints ? -8989283

Code:

void nextline()
{
int i;

i = dequeuedata();
printf("%c  %i" , name, i);

}

Code:

int dequeuedata()
{
	int i;
	struct customer * tempPtr;

     if(isEmpty(Q))
	 {
	 printf("No More Orders\n");
	
	 }
	strcpy(name, Q.front->firstname); 
   /* name is a global variable declared as char name[25] */
                  
	switch(ch) /* ch is a global variable */
	{
	case '1': 
	i= Q.front->BM;
	M.BM -= Q.front->BM;
	break;
	
          	}
	tempPtr = Q.front;

	Q.front = Q.front->next;
	if (Q.front == NULL)
		Q.rear = NULL;
	free (tempPtr);

	return i;
}

Because i is not initialized or changed (if ch != '1') in the dequeuedata function.

In dequeuedata initialize your variable:

Code:

int dequeuedata()
{
   int i = -1;
   ...