C++队列类以及其实现的问题，大家来帮我看看哪个地方错了

[as11qwer]

把错的地方注释下啊，谢谢大家！！！大家一定要帮我实现啊！！
#include<iostream.h>
#include<stdio.h>
typedef int DataType;
const int MaxQSize = 50;
class Queue
{
private:
// queue array and its parameters
int front,rear,count;
DataType qlist[MaxQSize];
public:
void setQueue(int *x){x=qlist;}//传递地址
// constructor
Queue(void):front(0),rear(0),count(0){} // initialize integer

//data members

// queue modification operations
void QInsert(const DataType &item)
{
if (QFull()) return;
qlist[rear++]=item;
rear%=MaxQSize;
++count;
}
DataType QDelete(void)
{
DataType t;
if(QEmpty()) return 0;
t=qlist[front++];
front%=MaxQSize;
--count;
return t;
}
void ClearQueue(void)
{
front=rear=count=0;
}

// queue access
DataType QFront(void)
{return qlist[front++];}
// queue test methods
int QLength(void) const{return count;}
int QEmpty(void) const{return count==0;}
int QFull(void) const{return count==MaxQSize;}
};
void main()
{
Queue Q;
int i;int b;
int a[MaxQSize];
Q.setQueue(a);
cout<<"请输入一串字符:"<<endl;
gets(a);
cout<<"请输入要插入的字符:"<<endl;、
cin>>b;
Q.QInsert(b);
cout<<"插入字符后的字符串为:"<<endl;
for(i=0;i<MaxQSize;i++)
cout<<a[i];
cout<<"删除第一个元素后字符串为:"<<endl;
for(i=0;i<MaxQSize;i++)
cout<<a[i];
cout<<"删除的元素值为:"<<endl;
cout<<Q.QDelete()<<endl;
}

[baihacker]

请输入一串字符:
123456
请输入要插入的字符:
1
插入字符后的字符串为:
1234561
删除第一个元素后字符串为:
1234561
删除的元素值为:
1
234561
Press any key to continue


#include <iostream.h> 
#include <stdio.h> 
#include <string.h>
typedef char DataType; 
const int MaxQSize = 50; 
class Queue 
{ 
private: 
	// queue array and its parameters 
	int front,rear,count; 
	DataType qlist[MaxQSize]; 
public: 

	Queue(void):front(0),rear(0),count(0){}      // initialize integer 
	
	//data members 
	
	// queue modification operations 
	void QInsert(const DataType &item) 
	{ 
		if (QFull()) return; 
		qlist[rear++]=item; 
		rear%=MaxQSize; 
		++count; 
	} 
	DataType QDelete(void) 
	{ 
		DataType t; 
		if(QEmpty()) return 0; 
		t=qlist[front++]; 
		front%=MaxQSize; 
		--count; 
		return t; 
	} 
	void ClearQueue(void) 
	{ 
		front=rear=count=0; 
	} 
	void Show()
	{
		for (int i = 0; i < count; ++i)
			cout << qlist[(i+front)%MaxQSize];
		cout << endl;
	}
	// queue access 
	DataType QFront(void) 
	{return qlist[front++];} 
	// queue test methods 
	int QLength(void) const{return count;} 
	int QEmpty(void) const{return count==0;} 
	int QFull(void) const{return count==MaxQSize;} 
}; 
void main() 
{ 
	Queue Q; 
	int i;char b; 
   char a[MaxQSize]; 
	cout <<"请输入一串字符:" <<endl; 
	gets(a); 
	for (i = 0; i < strlen(a); ++i)
		Q.QInsert(a[i]);
    cout <<"请输入要插入的字符:" <<endl;
		cin>>b; 
	Q.QInsert(b); 
	cout <<"插入字符后的字符串为:" <<endl; 
	Q.Show();
	cout <<"删除第一个元素后字符串为:" <<endl; 
	Q.Show();
	cout <<"删除的元素值为:" <<endl; 
	cout <<Q.QDelete() <<endl; 
	Q.Show();
}