学习使用stringstream stream;

再进行多次转换的时候，必须调用stringstream的成员函数clear().

#include <sstream>#include <iostream>int main(){std::stringstream stream;int first, second;stream<< "456"; //插入字符串stream >> first; //转换成intstd::cout << first << std::endl;stream.clear(); //在进行多次转换前，必须清除streamstream << true; //插入bool值stream >> second; //提取出intstd::cout << second << std::endl;}