#include <string>



string answer("nu");//这里有什么错误?

#include <iostream.h>
#include <stdio.h>
#include <string>
#include <stdlib.h>
struct storage
{
int upper;
int lower;
storage *next;
};
struct request
{
int count;
request *right;
storage *next;
};
storage *base;
storage *pnext;
storage *pchange;
/*string analysis(int count)
{
return "YES";
}*/
void halls()
{
int count,request;
cin>>count;
cout<<endl;
string answer("nu");
for(int i=0;i<count;i++)
{
cin>>request;
// answer =analysis(request);
cout<<answer;
}
}
void main()
{
halls();
}

头文件要有.h或者用
#include<cstring>
using namespace std;

头文件要有.h或者用
#include<string>
using namespace std;