汽车、客车、货车
Description
定义Vehicle类，包括：
一个int类型属性num，表示汽车的轮子数量。
构造函数、析构函数，输出如样例所示的信息。
定义Bus类，是Vehicle类的子类，包括：
一个int类型属性guest，表示客车可乘坐的人数。
构造函数、析构函数，输出如样例所示的信息。
定义Truck类，是Vehicle类的子类，包括：
一个int类型属性weight，表示货车可载荷的货物重量。
构造函数、析构函数，输出如样例所示的信息。
Input
输入有多行，每行一个测试用例，每行包括1个正整数（车的轮子数量）、1个字符b或者t（b、t分别表示客车、货车）、1个正整数（可乘坐的人数或可承载的货物重量）。
Output
见样例。
Sample Input
4 b 40
8 t 15
Sample Output
Vehicle has 4 wheels is created.
Bus which can carry 40 persons is created.
Bus which can carry 40 persons is erased.
Vehicle has 4 wheels is erased.
Vehicle has 8 wheels is created.
Truck which can carry 15 tons goods is created.
Truck which can carry 15 tons goods is erased.
Vehicle has 8 wheels is erased.
题目给定代码
int main()
{
int w, g;
char t;
Vehicle *veh;
while (cin>>w>>t>>g)
{
if (t == 'b')
{
veh = new Bus(w, g);
}
else
{
veh = new Truck(w, g);
}
delete veh;
}
return 0;
}
code:
#include<iostream>
using namespace std;
class Vehicle{
protected:
int num;
public:
Vehicle(int n){
num=n;
cout<<"Vehicle has "<<num<<" wheels is created."<<endl;
}
virtual ~Vehicle(){
cout<<"Vehicle has "<<num<<" wheels is erased."<<endl;
}
};
class Bus:public Vehicle{
int guest;
public:
Bus(int w,int g):Vehicle(w){
guest=g;
cout<<"Bus which can carry "<<guest<<" persons is created."<<endl;
}
~Bus(){
cout<<"Bus which can carry "<<guest<<" persons is erased."<<endl;
}
};
class Truck:public Vehicle{
int weight;
public:
Truck(int w,int g):Vehicle(w){
weight=g;
cout<<"Truck which can carry "<<weight<<" tons goods is created."<<endl;
}
~Truck(){
cout<<"Truck which can carry "<<weight<<" tons goods is erased."<<endl;
}
};
int main()
{
int w, g;
char t;
Vehicle *veh;
while (cin>>w>>t>>g)
{
if (t == 'b')
{
veh = new Bus(w, g);
}
else
{
veh = new Truck(w, g);
}
delete veh;
}
return 0;
}