编程：VC++ 类的继承，构造函数，数据初始化

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功能：类的继承，构造函数，数据初始化

作者：TAHO

时间：2012年10月29日

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#include <iostream.h>

class vehicle
{
protected:
int wheels,weight;
public:
vehicle(int i,int j)
{
wheels=i;
weight=j;
}
int get2ws() //这里的return功能不能被写进构造函数vehicle(…)里，否则不被执行，构造函数只负责数据初始化，不负责返回数值等操作。
{
return wheels;
return weight;
}
};

class car:private vehicle //私有继承
{
public:
int passenger_load;
car(int i,int j,int p_l):vehicle(i,j) //构造函数，有i,j，初始化了基类的成员i,j
{
passenger_load=p_l;
cout<<“The wheels number of car is: ”<<wheels<<endl;
cout<<“The weight of car is: ”<<weight<<endl;
cout<<“The passenger load of car is ”<<passenger_load<<“nn”;
}
};

class truck:private vehicle //私有继承
{
public:
int passenger_load,payload;
truck(int i,int j,int p_l,int pay_l):vehicle(i,j) //构造函数，有i,j，又一次初始化了基类的成员i,j，旧的i,j值被替换
{
passenger_load=p_l;
payload=pay_l;
cout<<“The wheels number of truck is: ”<<wheels<<endl;
cout<<“The weight of truck is: ”<<weight<<endl;
cout<<“The passenger load of truck is ”<<passenger_load<<endl;
cout<<“The payload of truck is ”<<payload<<“nn”;
}
};

void main()
{
car car1(4,10,6);
truck truck1(6,25,2,40);
}