大一第二学期第6周【程序阅读（4）】

#include <iostream>using namespace std;class example{public:    example()    {        cout<<"Default Constructing! "<<endl;    }    example(int n)    {        i=n;        cout<<"Constructing: "<<i<<endl;    }    ~example()    {        cout <<"Destructing: "<<i<<endl;    }    int get_i()    {        return i;    }private:    int i;};int sqr_it(example o){    return o.get_i()* o.get_i();}int main(){    example x(10);    cout<<x.get_i()<<endl;    cout<<sqr_it(x)<<endl;    return 0;}