C++继承与派生讲解.ppt
文本预览下载声明
*;第8章 继承与派生;回顾;*;自行车 Bicycle;双人自行车 Tandem Bike;竞速自行车 Racing Bike;8.1 继承的概念-例子;8.1 继承的概念-例子;8.1 继承的概念;*;8.2 定义基类和派生类;*;例8-1 简单的继承和派生;class Tshape
{
private:
uint _x, _y; //几何形状的位置
public:
TShape( );
uint getX( );
uint getY( );
void setX( uint x );
void setY( uint y );
void Draw( );
};;//TShape01.cpp： 类TShape的实现
#include TShape01.h
#include iostream
using namespace std;
TShape::TShape( )
{
_x = 10; _y = 10;
}
void TShape::Draw( )
{
coutThis is TShape::Draw()endl;
};#include TShape01.h
class TEllipse: public TShape
{
public:
void Draw( );
};;// TEllipse01.cpp： 类TEllipse的实现
#include TEllipse01.h
#include iostream
using namespace std;
void TEllipse::Draw( )
{
coutDraw an ellipse with colorendl;
};*;8.2.2 定义派生类;*;8.2.3 访问控制和继承关系;8.2.3 访问控制和继承关系;1. 公有继承 ;class Point {//基类
public:
void InitP(float xx=0, float yy=0)
{X=xx; Y=yy;}
void Move(float xOff, float yOff)
{X+=xOff; Y+=yOff;}
float GetX() {return X;}
float GetY() {return Y;}
private:
float X,Y;
};;2. 私有继承 ;3.保护继承 ;class Point
{
public:
void InitP( float xx=0, float yy=0 )
{X=xx; Y=yy;}
void Move( float xOff, float yOff )
{X+=xOff; Y+=yOff;}
float GetX( ) {return X;}
float GetY( ) {return Y;}
private:
float X,Y;
};;私有继承和保护继承的区别;继承方式影响访问控制;*;8.2.4 同名覆盖 override ;class Shape {
public:
┇
void Draw(){ };
protected:
┇
};
;*;8.3 构造函数与析构函数 ;*;8.3.1 基类只有无参数的构造函数;*;8.3.2 派生类的构造函数;8.3.2 派生类的构造函数;//TShape04.cpp
#include TShape04.h
#include iostream
TShape::TShape(uint x, uint y){
_x = x;
_y = y;
}
void TShape::Draw(){
std::coutThis is TShape::Draw()std::endl;
}
void TShape::getXY(uint x, uint y){
x = _x;
y = _y;
}
void TShape::getRGB(uchar R, uchar G, uchar B){
R = _RED;
G = _GREEN;
B = _BLUE;
};//TEllipse04.cpp
#include TEllipse04.h
#include iostream
TEllipse::TEllipse(uint longR, uint shortR,
uint x, uint y):TShape(x,y){
_longR = longR;
_shortR = shortR
显示全部