您好,登錄后才能下訂單哦!
思路:
棧s1和棧s2,s1用來Push數據,s2用來Pop數據
入隊:數據直接壓入棧s1中
出隊:若s2為空,則把s1中除過最后一個壓入的元素全部移入s2中,然后彈出s1的棧頂元素
若s2不為空,直接彈出s2的棧頂元素
#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<stack>
#include<assert.h>
using namespace std;
template<typename T>
class Queue
{
public:
Queue()
{
//利用庫里面的stack的構造函構造s1和s2
}
Queue( const Queue & que)
{
s1 = que.s1;
s2 = que.s2;
}
~Queue()
{
//利用stack類來完成s1和s2的釋放
}
void Push(const T&t)
{
s1.push( t);
}
void Pop()
{
assert(s1.size() != 0 || s2.size() != 0);
if (s2.size() == 0)
{////把s1中除了棧底元素,其他全部push進s2中
while (s1.size() != 1)
{
s2.push(s1.top());
s1.pop();
}
s1.pop();
}
else
{
s2.pop();
}
}
T& Front() //讀取隊列的隊首元素
{
assert(s1.size() != 0 || s2.size() != 0);
if (s2.size() != 0)
{
return s2.top();
}
else
{
while (s1.size() != 1)
{
s2.push(s1.top());
s1.pop();
}
return s1.top();
}
}
T& Back() //讀取隊列的隊尾元素
{
assert(s1.size() != 0 || s2.size() != 0);
if (s1.size() != 0)
{
return s1.top();
}
else
{
while (s2.size() != 1)
{
s1.push(s2.top());
s2.pop();
}
return s2.top();
}
}
bool Empty() //判斷空
{
if (s2.size() == 0 && s2.size() == 0)
{
return true ;
}
else
{
return false ;
}
}
size_t Size()
{
return s1.size() + s2.size();
}
template<typename T>
friend ostream &operator<<(ostream& _cout, const Queue <T>&que);
private:
stack<T > s1;
stack<T > s2;
};
template<typename T>
ostream& operator<<(ostream &_cout, const Queue <T>& que)
{
Queue<T >coutque(que);
_cout << "Queue:" ;
while (coutque.s2.size() > 0)
{
_cout << coutque.s2.top() << " ";
coutque.s2.pop();
}
while (coutque.s1.size() > 0)
{
coutque.s2.push(coutque.s1.top());
coutque.s1.pop();
}
while (coutque.s2.size() > 0)
{
_cout << coutque.s2.top() << " ";
coutque.s2.pop();
}
_cout << " " ;
return _cout ;
}
void Test()
{
Queue<int > que;
que.Push(1);
que.Push(2);
que.Push(3);
que.Push(4);
que.Push(1);
que.Push(2);
que.Push(3);
que.Push(4);
cout << que << endl;
/*que.Pop();
que.Pop();
que.Pop();
cout << que << endl;*/
/*int head1=que.Front();
cout << head1<<endl;
que.Pop();
int head2 = que.Front();
cout << head2<<endl;*/
/*int tail1 = que.Back();
cout << tail1 << endl;*/
int ret=que.Size();
cout << ret << endl;
}
int main()
{
Test();
return 0;
}
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。