c++ 拷贝

 

对应c++拷贝方式，我倒是较熟悉。但是对应指针的拷贝，我有些迷糊，所有做了一个简单的程序测试一下。

//object.h

#ifndef OBJECT_H_
#define OBJECT_H_

#include <iostream>

class object{
public:
    object(){
        std::cout << "object()" << std::endl;
    }

    object(const object&){
        std::cout << "object(const object&)" << std::endl;
    }

    ~object(){
        std::cout << "~object()" << std::endl;
    }
};

#endif /* OBJECT_H_ */

main.cpp

#include <iostream>
#include "object.h"

int main(int argc, char **argv) {
    object obj1;
    object obj2(obj1);
    object obj3 = obj2;

    std::cout << "---------------------" << std::endl;

    object *pObj1 = new object();
    object *pObj2(pObj1);

    std::cout << "pObj1=" << pObj1 << std::endl;
    std::cout << "pObj2=" << pObj2 << std::endl;

    std::cout << "---------------------" << std::endl;

    return 0;
}

输出结果：

 

经过测试我们可以发现：

 object *pObj1 = new object();
 object *pObj2(pObj1);

这只是一种简单的值（地址）的拷贝。现在，pObj1和pObj2指向同一个对象。