6.20 同一单词出现两次

#include<iostream>
#include<string>
using namespace std;
int main()
{
	string laststr,currentstr="";
	while(cin>>currentstr)
	{
		if(currentstr==laststr)
			break;
		laststr = currentstr;
	}
	if(currentstr==laststr&&laststr!="")
		cout<<"the same string:"<<laststr<<endl;
	else
		cout<<"no same string"<<endl;
}

　　

转载于:https://www.cnblogs.com/chhyong88/archive/2011/12/01/2270403.html