c语言关于链式队列的一些问题

#include<stdio.h>
#include<stdlib.h>
typedef struct LinkQueue {
int data;
struct LinkQueue *next;
}LinkQueue,*LinkStr;
typedef struct Link{
LinkStr front;
LinkStr rear;
}Link;
Link* InitQueue(Link* q);
void EnterQueue(Link* q);
int main(void) {
Link* queue = NULL;
queue=InitQueue(queue);
EnterQueue(queue);
return 0;
}
//初始化
Link*  InitQueue(Link* q) {
q->front=q->rear= (LinkStr)malloc(sizeof(LinkQueue));
q->front->next = NULL;
return q;
}
//入队列
void EnterQueue(Link* q) {
LinkQueue *number = NULL;
number = (LinkQueue*)malloc(sizeof(LinkQueue));
int n = 0;
int flag = 1;
printf("请输入元素:");
while (flag) {
scanf("$%d", &n);
if (n != -1) {
number->data = n;
q->rear->next = number;
q->rear = number;
}
else {
flag = 0;
}
}
}