如何理解复制控制成员和构造函数

#include "stdafx.h"#include <iostream> #include <vector>using namespace std; struct Exmp1{Exmp1() {cout<<"Exmp1()"<<endl;}Exmp1(const Exmp1&){cout<<"Exmp1(const Exmp1&)"<<endl;}Exmp1 &operator = (const Exmp1 &rhs){cout<<"Exmp1 &operator = (const Exmp1 &rhs)"<<endl;return *this;}~Exmp1(){cout<<"~Exmp1()"<<endl;}};void fun1(Exmp1 obj){cout<<"void fun1(Exmp1 obj)"<<endl;}void fun2(Exmp1 &obj){cout<<"void fun2(Exmp1 &obj)"<<endl;}Exmp1 fun3(){Exmp1 obj;return obj;}int main(){Exmp1 eobj;fun1(eobj);fun2(eobj);eobj=fun3();Exmp1 *p=new Exmp1;vector<Exmp1> evec(3);delete p;return 0;}

详细见primer P414

得到的输出结果是：