题解 1681: 数据结构-行编辑程序 stack

#include<iostream>
#include<stack>
#include<string>
using namespace std;
int main()
{
    string str;
    stack<char>s;
    while(getline(cin,str))
    {
        for(int i=0;i<str.size();i++)
        {
            if(str[i]=='#')
             s.pop();
            else if(str[i]=='@')
            {
                while(!s.empty())
                {
                    s.pop();
                }
            }
            else
             s.push(str[i]);
             
        }
        
        char a[1000];
        int i=0;
        while(!s.empty())
        {
            a[i]=s.top();
            s.pop();
            i++;
            
        }
        for(int j=i-1;j>=0;j--)
        {
            cout<<a[j];
        }
        cout<<endl;
    }
    return 0;
    
}