循环队列
//定义循环队列
typedef struct CircleIntQueue {
int data[TOTAL_SPACE];
int head;
int tail;
} *CircleIntQueuePtr;
/生成循环链表
CircleIntQueuePtr initQueue() {
CircleIntQueuePtr resultPtr = (CircleIntQueuePtr)malloc(sizeof(struct CircleIntQueue));
resultPtr->head = 0;
resultPtr->tail = 0;
return resultPtr;
}
//添加元素
void enqueue(CircleIntQueuePtr paraPtr, int paraValue) {
//这里的+1 你可以具体带数字进行验证
//验证了你就会发现+1的作用
//%是防止数据超过规定的max 毕竟是个循环
if ((paraPtr->tail + 1) % TOTAL_SPACE == paraPtr->head) {
printf("Queue full.rn");
return;
}
//合法存入
//尾巴++
paraPtr->data[paraPtr->tail % TOTAL_SPACE] = paraValue;
paraPtr->tail++;
}
删除
int dequeue(CircleIntQueuePtr paraPtr) {
int resultValue;
//首先检查是否为空
if (paraPtr->head == paraPtr->tail) {
printf("No element in the queue.rn");
return -1;
}
//删除头数据
//复制其值
resultValue = paraPtr->data[paraPtr->head % TOTAL_SPACE];
//head++ 删除其值
paraPtr->head++;
return resultValue;
}
//输出队列
void outputLinkQueue(CircleIntQueuePtr paraPtr) {
int i;
//检查是否为空
if (paraPtr->head == paraPtr->tail) {
printf("Empty queue.");
return;
}
printf("Elements in the queue: ");
//循环打印
for (i = paraPtr->head; i < paraPtr->tail; i++) {
printf("%d, ", paraPtr->data[i % TOTAL_SPACE]);
//%的作用防止数大咯
}
printf("rn");
}
//测试代码
void testLinkQueue() {
int i = 10;
CircleIntQueuePtr tempPtr = initQueue();
for (; i < 16; i ++) {
enqueue(tempPtr, i);
}
outputLinkQueue(tempPtr);
for (i = 0; i < 6; i ++) {
printf("dequeue gets %drn", dequeue(tempPtr));
}
enqueue(tempPtr, 8);
outputLinkQueue(tempPtr);
}
int main() {
testLinkQueue();
return 1;
}
运行截图