初识c++-蒲公英云

初识c++

小鱼儿 2022-07-13 10:45 366阅读 0赞

　　这几天一直在写网络编程，感觉有点枯燥，今天在看了半个小时的网络后，开始看c++。因为学过c的缘故，c++上手的时候感觉不怎么难，比较容易理解，前面几章看的比较快，在看到构造函数和析构函数、共有结点与友元还有单继承和多继承的时候，感觉就有点吃力了。在理解了几个程序后，大概也理解了60%吧。

1、带参数的构造函数

/*********************************************************************
File Name:               gouzao.cpp
Author:                          date:
Description:            
Fuction List:            
********************************************************************/
#include <iostream>
#include <string.h>
using namespace std;
class Cshose
{
    public:
        Cshose();
        Cshose(int s, char* strcolor);
        ~Cshose();
        int getsize();
        char* getcolor();
    private:
        int size;
        char color[10];
};
Cshose::Cshose()
{
    size = 40;
    strcpy(color, "红色");
}
Cshose::Cshose(int s, char* strcolor)
{
    size = 40;
    strcpy(color, strcolor);
}
int Cshose::getsize()
{
    return size;
}
char* Cshose::getcolor()
{
    return color;
}
Cshose::~Cshose()
{
    cout<<"销毁对象！"<<endl;
}
int main()
{
    Cshose shose1;
    Cshose shose2(38,"白色");
    cout<<"休闲鞋的尺寸为："<<shose1.getsize()<<"\t颜色为："<<shose1.getcolor()<<endl;
    cout<<"休闲鞋的尺寸为："<<shose2.getsize()<<"\t颜色为："<<shose2.getcolor()<<endl;
    return 0;
}

2、子类的构造函数

#include <iostream>
using namespace std;
class Cpoint
{
    public:
        Cpoint();
        Cpoint(int x, int y);
        void disp();
        void getxy(int &x, int &y);
    private:
        int m_x;
        int m_y;
};
Cpoint::Cpoint()
{
    m_x = 0;
    m_y = 0;
    cout<<"调用Cpoint默认构造函数"<<endl;
}
Cpoint::Cpoint(int x, int y)
{
    m_x = x;
    m_y = y;
    cout<<"调用Cpoint构造函数"<<endl;
}
void Cpoint::getxy(int &x, int &y)
{
    x = m_x;
    y = m_y;
}
void Cpoint::disp()
{
    cout<<m_x<<","<<m_y<<endl;
}
class C3point:public Cpoint
{
    public:
        C3point();
        C3point(int x, int y, int z);
        void disp();
    private:
        Cpoint p;
        int m_z;
};
C3point::C3point():Cpoint()
{
    m_z = 0;
    cout<<"调用C3point默认构造函数"<<endl;
}
C3point::C3point(int x, int y, int z):Cpoint(x, y),p(x, y)
{
    m_z = z;
    cout<<"调用C3point构造函数"<<endl;
}
void C3point::disp()
{
    int x;
    int y;
    p.getxy(x, y);
    cout<<x<<","<<y<<","<<m_z<<endl;
}
int main()
{
    C3point point1;
    C3point point2(50, 80, 10);
    Cpoint p(20,30);
    p.disp();
    point1.disp();
    point2.disp();
    return 0;
}