class Tyre {
private:
int radius;
int width;
public:
Tyre(int r, int w):radius(r), width(w) { }
};
class Engine {
};
class Car {
// 这个类就是所谓的封闭类
//其中包括成员对象Engine和Tyre
private:
int price;
Tyre tyre;
Engine engine;
public:
Car(int p, int tr, int tw);
};
Car::Car(int p, int tr, int w):price(p), tyre(tr, w){
};
int main(){
Car car(20000,17,225);
return 0;
}
class Tyre {
public:
Tyre() { cout << "Tyre contructor" << endl; }
~Tyre() { cout << "Tyre destructor" << endl; }
};
class Engine {
public:
Engine() { cout << "Engine contructor" << endl; }
~Engine() { cout << "Engine destructor" << endl; }
};
7
class CCar {
private:
Engine engine;
Tyre tyre;
public:
Car( ) { cout << “Car contructor” << endl; }
~Car() { cout << "Car destructor" << endl; }
};
int main(){
Car car;
return 0;
}
#include<iostream>
using namespace std;
class Date
{
public:
Date( ){ cout<<"This is Date"<<endl; } //Date的缺省构造函数
Date(int A) { cout<<"The value="<<A<<endl; };
class Time
{
public:
Time( ) {cout<<"This is Time"<<endl; //Time的缺省构造函数
Time(int A):d2( A ) //Time的构造函数。采用成员初始化列表的方式，成员对象d1的形参未初始化
,将成员对象d2的形参初始化为A
{
cout<<"Hello!"<<endl;
}
private:
Date d1 , d2; //在Time中声明两个数据成员d1和d2，这两个成员是Date类的两个对象，即d1和d2是成员对象
};
void main( )
{
Time t1, t2(6); //注释1
cout<<"The end"<<endl;
}讲讲c++ Session 5：成员对象（Member objects）和封闭类（Enclosing class）
原文地址：http://blog.csdn.net/p641290710/article/details/41256113
