stringstream使用小结

1.头文件：#include<sstream>

2.stringstream是C++提供的串流（stream）物件

3、clear()重置流的标志状态；str()清空流的内存缓冲，重复使用内存消耗不再增加！

 #include<string>
 #include<sstream>
 #include<iostream>
 using namespace std;
 int main()
 {
     stringstream sstream;//定义流
     sstream << "first" << " " << "string,";
     sstream << " second string";
     cout << "strResult is: " << sstream.str() << endl;//str()方法能够将流转换为string，但这不影响原sstream
     sstream.str("");//清空内存
     sstream << "third string";
     cout << "After clear, strResult is: " << sstream.str() << endl;
     return ;
 }