我試圖使用以下結構使用鏈接列表實現隊列。但在排隊功能,就在評論下面,我得到了上面提到的錯誤。這個錯誤已經發生,而同樣的在這個鏈接http://quiz.geeksforgeeks.org/queue-set-2-linked-list-implementation/給出的代碼中使用。有一個我用來運行代碼的評論。但我不明白爲什麼我得到這個錯誤。請幫忙 !'結構隊列'沒有名爲'next'的成員。
#include<stdio.h>
#include<stdlib.h>
struct node
{
int data;
struct node *next;
};
struct queue
{
struct queue *front;
struct queue *rear;
};
struct queue* createQueue();
void enqueue(struct queue *q,int info);
int dequeue(struct queue *q);
void display(struct queue *q);
int isEmpty(struct queue *q);
void menu();
struct queue* createQueue()
{
struct queue *new_queue;
new_queue = (struct queue*) malloc(sizeof(struct queue));
if(new_queue != NULL)
{
return ;
}
new_queue->front = new_queue->rear = NULL;
return new_queue;
}
int isEmpty(struct queue *q)
{
if(q->front == NULL)
return 1;
}
void enqueue(struct queue *q,int info)
{
struct node *temp,*temp1;
temp = (struct node*) malloc(sizeof(struct node));
if(temp == NULL)
return ;
temp->data = info;
temp->next = NULL;
if(q->front == NULL && q->rear == NULL)
{
q->front = temp;
q->rear = temp;
}
if(q->rear != NULL)
{
//temp1 = q->rear;
q->rear->next = temp;
q->rear = temp;
}
}
int dequeue(struct queue *q)
{
if(isEmpty(q) == 1)
{
printf("Empty list!");
}
struct node *temp = q->front;
q->front = temp->next;
int data = temp->data;
free(temp);
return (data);
}
void display(struct queue *q)
{
struct node *start,*end = NULL;
start = q->front;
end = q->rear;
if(isEmpty(q) == 1)
{
printf("Empty List!");
}
while(start != NULL)
{
printf("%d",start->data);
start = start->next;
}
}
void menu()
{
int choice = 0;
int input = 0;
struct queue *q;
while(1)
{
printf("\t\tMain Menu\n");
printf("\t0.Create Queue\n");
printf("\t1.Enqueue\n");
printf("\t2.Dequeue\n");
printf("\t3.Display\n");
printf("\t4.Exit\n");
printf("\tEnter the desired choice:");
scanf("%d",&choice);
switch(choice)
{
case 0:
q = createQueue();
break;
case 1:
printf("\tEnter the data:");
scanf("%d",&input);
enqueue(q,input);
break;
case 2:
printf("%d",dequeue(q));
break;
case 3:
display(q);
break;
case 4:
exit(0);
default:
printf("\tThe value is invalid!");
}
}
}
int main()
{
menu();
return 0;
}
謝謝你的解決方案。雖然這是一個愚蠢的錯誤,很尷尬!但是,你能告訴我你剛纔提到的其他錯誤! – nile