<未完>再次研究指针和引用
来源：互联网 发布：修改硬件信息软件 编辑：程序博客网 时间：2024/05/16 01:59
#include <iostream>using namespace std;class apple{public:int id;public:apple(int id){ this->id = id;}void operator=(apple tmp){this->id = tmp.id;}};void f1(apple* app){ app = new apple(101);}void f2(apple& app){ apple* tmp = new apple(101); app = *tmp;}void f3(apple* &app){ app = new apple(101);}void f4(apple app){ apple* tmp = new apple(101); app = *tmp;}int main(){ apple* app = new apple(100); apple app2 = *app; //f1(&app2); //f3(&app2);报错 //apple* c = &app2; //f3(c); f4(app2); //app->id cout << app2.id << endl;}//f1:100//f2:101//f3:101//f4:100//app2//f1:100//f2:101//f3:错误//f3:100//f4:100#include <iostream>using namespace std;class apple{public:int id;public:apple(int id){ this->id = id;}void operator=(apple tmp){this->id = tmp.id;}};void f1(apple* app){ //app = new apple(101);app->id = 101;}void f2(apple& app){ apple* tmp = new apple(101); app = *tmp;}void f3(apple* &app){ app = new apple(101);}void f4(apple app){ apple* tmp = new apple(101); app = *tmp;}int main(){ apple* app = new apple(100); apple app2 = *app; //f1(&app2); //f3(&app2);报错 //apple* c = &app2; //f3(c); //f4(app2); //app->id f1(app); cout << app->id << endl;}//这个竟然输出101………………
