大一第二学期第6周【程序阅读（3）】

#include <iostream>using namespace std;class B{public:    B()    {        cout<<"default constructor"<<endl;    }    ~B()    {        cout<<"destructed"<<endl;    }    B(int i):data(i)    {        cout<<"constructed: " << data <<endl;    }private:    int data;};B Play(B b){    return b ;}int main(){    B temp = Play(5);    return 0;}