STL之stack

```
#include<iostream>
#include<algorithm>
#include<stack>
#include<cstring>
#include<cstdlib>
using namespace std;

void test01(){
    //初始化
    stack<int> s1;
    stack<int> s2(s1);

    //stack操作
    s1.push(10);
    s1.push(20);
    s1.push(30);
    s1.push(100);
    cout<<"栈顶元素:"<<s1.top()<<endl;
    s1.pop();//删除栈顶元素

    //打印栈容器数据
    while(!s1.empty()){
        cout<<s1.top()<<" ";
        s1.pop();
    }
    cout<<endl;
    cout<<"size:"<<s1.size()<<endl;

}

int main()
{
    test01();

    return 0;
}

```