C++primer6.20

这次参考之前C++primer的习题答案，的确比较方便：

问题是比较输入一系列string，如果发现连续相同的string则输入结束，否则循环进行：

#include <iostream>
#include<string>
using namespace std;


int main()
{
  string cur,pre;
  bool flag = true;
  cout << "Please input string: " ;
  while (cin >> cur )
  {
    if (cur == pre)
    {
		if(!cur.empty())
		  cout << "The repeat words are "<<cur <<endl;
		else
			cout << "There is no repeated word" << endl;
		break;
    }
	else
	{
		cout << "Please input string: " ;
		pre = cur;
	}
  }
 
}