c++输入输出操作符重载

输入输出操作符重载：

#include <iostream>#include <vector>#include <map>#include <exception>using namespace std;class test{public:test(int i):t(i){}virtual ~test();friend ostream& operator<<(ostream &out, const test& te);friend istream& operator>>(istream &in, test& te);private:int t;char *buf;};ostream& operator<<(ostream &out, const test& te){out << "test.t == " << te.t <<endl;return out;}istream& operator>>(istream& in, test& te){in>>te.t;if(!in)te = test(0);return in;}test::~test(){}int main(int argc, char *argv[]){test te(7);cin >> te;cout <<unitbuf<< te;   //unitbuf用于刷新所有数据输出    return 0;}