Data Structure - Sequential team

#include<stdio.h>
#define MaxSize 15

typedef struct SqQueue{
    int data[MaxSize];
    int front;
    int rear;
}SqQueue,*SQueue;

//初始化
void init(SqQueue &S){
    
    S.front = 0;
    S.rear = S.front;
    
} 

//判断队空
int isQueueEmpty(SqQueue S){
    if(S.front == S.rear){
        return 1;
    }else{
        return 0;
    }
} 

//进队操作
int enQueue(SqQueue &S,int x){
    SqQueue ss;
    init(ss);
    
    if((S.rear+1)%MaxSize==S.front){
        
        return 0;
    }
    
    S.rear = (S.rear + 1)%MaxSize;
    S.data[S.rear] = x;
    return 1;
}

//出队操作
int deQueue(SqQueue &S,int &x){
    if(S.front == S.rear){
        return 0;
    }
    S.front = (S.front + 1)%MaxSize;
    x = S.data[S.front];
    return 1;
}

int main(){
    SqQueue S;
    int a = enQueue(S,3);
    printf("%d",a);
    
    return 0;
}