C++ 引用/指针/对象名调用

不念不忘少年蓝@ 2022-08-07 07:55 145阅读 0赞

# 示例 #

#include <iostream>
    
    using namespace std;
    
    class Kid
    {
    private:
    int age;
    char*name;
    char*sex;
    public:
            Kid(int age,char*name,char*sex);
            Kid(const Kid &kid);  //自定义拷贝函数
    ~Kid(); 
    void showKid();
    };
    
    
    Kid::Kid(int age,char*name,char*sex)
    {
        Kid::age=age;
        Kid::name=new char[strlen(name)+1];
        strcpy(Kid::name,name);
        Kid::sex=new char[strlen(sex)+1];
        strcpy(Kid::sex,sex);
    }
    
    //Kid::Kid(int age,char *name,char *sex):age(age),name(name),sex(sex) //用成员初始化表对数据成员初始化
    //{ 
    //
    //}
    
    Kid::Kid(const Kid &kid)
    {
        Kid::age=kid.age*2;
        int c=strlen(kid.name)+1;//一定要+1用来存放‘/0’字符串结束标志，否则会内存溢出
        Kid::name=new char[c];
        strcpy(Kid::name,kid.name);
        Kid::sex=new char[strlen(kid.sex)+1];
        strcpy(Kid::sex,kid.sex);
    }
    
    Kid::~Kid() //自定义析构函数
    {
    
        delete []Kid::name; //delete运算符释放存储空间
        delete []Kid::sex;
        cout<<"dispose object kid"<<Kid::age<<endl;
    }
    
    void Kid::showKid()
    {
        cout<<"孩子:"<<endl<<"姓名："<<name<<endl<<"年龄："<<age<<endl<<"性别："<<sex<<endl;
    }
    
    class Car
    {    
    public:
    char*no;
    char*brand;
    int speed;
    void showCar();
    ~Car();//仿默认析构
    };
    
    Car::~Car()
    {
         cout<<"dispose object car"<<endl;
    }
    
    
    void Car::showCar()
    {
        cout<<"汽车:"<<endl<<"号码："<<no<<endl<<"品牌："<<brand<<endl<<"速度："<<speed<<"km/h"<<endl;
    }
    
    int main()
    {
        Kid kid(10,"rookie_j","男");
        kid.showKid();
    
        cout<<"--------------------"<<endl;
    
        Kid kid2(kid); //代入法调用拷贝构造函数
        kid2.showKid();
    
        cout<<"--------------------"<<endl;
    
        Kid kid3=kid2; //赋值法调用拷贝构造函数
        kid3.showKid();
    
        cout<<"--------------------"<<endl;
    
        Kid *ptr=new Kid(10,"rookie_x","女"); //使用new运算符动态创建对象
        ptr->showKid();
    
        cout<<"--------------------"<<endl;
    
    delete ptr; //释放对象所占的存储空间
    
        Car car={
       "8888888","Benz",200},car2;//只有没定义构造函数的类，才能用初始值表初始化公有数据成员，默认构造
        car.showCar();
    
    
        cout<<"--------------------"<<endl;
    
        car2=car;//默认拷贝构造函数或car2(car)
        car2.showCar();
    
        cout<<"--------------------"<<endl;
    
    return 0;
    }

运行结果：  
![运行结果][20150324213436445]

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# 引用指针详解 #

[转载~引用指针分析][Link 1]

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[20150324213436445]: /images/20220805/39748a00d9ab4d88b61c515aea4a4044.png
[Link 1]: http://blog.csdn.net/thisispan/article/details/7456169