标签：pac cout stream pre std using stack while push
#include <iostream>
#include <stack>
using namespace std;
int main(){
int a;
stack<int> s;
while(cin>>a){
if(a==1){
int b;
cin>>b;
s.push(b);
}
if(a==2)
cout<<"The top is "<<s.top()<<endl;
if(a==3)
s.pop();
}
return 0;
}
标签：pac cout stream pre std using stack while push
原文地址：http://www.cnblogs.com/HC-LittleJian/p/7533262.html
