7-3 动物世界 (15 分)
补充程序 ：
1、实现Mammal类的方法
2、由Mammal类派生出Dog类，在Dog类中增加itsColor成员(COLOR类型)
3、Dog类中增加以下方法：
constructors: Dog()、Dog(int age)、Dog(int age, int weight)、Dog(int age, COLOR color)、 Dog(int age, int weight, COLOR color)、~Dog()
accessors: GetColor()、SetColor()
Other methods: WagTail()、BegForFood() ，并实现以上这些方法 。
提示：类似Speak()、WagTail()这些动作，函数体可以是输出一句话。比如：Mammal is spaeking... , The Dog is Wagging its tail...
4、补充主函数的问号部分，并运行程序，检查输出是否合理。
enum COLOR{ WHITE, RED, BROWN, BLACK, KHAKI };class Mammal{
public: //constructors
Mammal();
Mammal(int age);
~Mammal(); //accessors
int GetAge() const; void SetAge(int); int GetWeight() const; void SetWeight(int); //Other methods
void Speak() const; void Sleep() const;
protected: int itsAge; int itsWeight;
};int main(){
Dog Fido; Dog Rover(5); Dog Buster(6, 8); Dog Yorkie(3, RED); Dog Dobbie(4, 20, KHAKI);
Fido.Speak();
Rover.WagTail(); cout << "Yorkie is " << ?? << " years old." << endl; cout << "Dobbie weighs " << ?? << " pounds." << endl;
return 0;
}
输入格式:
无
输出格式:
按照程序格式输出。
输入样例:
在这里给出一组输入。例如：
无
输出样例:
在这里给出相应的输出。例如：
Mammal is speaking...
The dog is wagging its tail...
Yorkie is 3 years old.
Dobbie weighs 20 pounds.
作者
陈晓梅
单位
广东外语外贸大学
代码长度限制
16 KB
时间限制
400 ms
内存限制
64 MB
enum COLOR{ WHITE, RED, BROWN, BLACK, KHAKI };
#include<iostream>
using namespace std;
class Mammal{
public:
Mammal(){
itsAge=0;
itsWeight=0;
}
Mammal(int age){
itsAge=age;
}
Mammal(int age,int weight){
itsAge=age;
itsWeight=weight;
}
int GetAge()const{
return itsAge;
}
int GetWeight()const{
return itsWeight;
}
void SetWeight(int Weight){
itsWeight=Weight;
}
protected:
int itsAge;
int itsWeight;
};
class Dog:public Mammal{
COLOR itsColor;
public:
void Speak(){
cout<<"Mammal is speaking..."<<endl;
}
void WagTail(){
cout<<"The dog is wagging its tail..."<<endl;
}
Dog(){}
Dog(int age):Mammal(age){}
Dog(int age,int weight):Mammal(age,weight){}
Dog(int age,int weight,COLOR x):Mammal(age,weight){
itsColor=x;
}
};
int main(){
Dog Fido;
Dog Rover(5);
Dog Buster(6, 8);
Dog Yorkie(3, RED);
Dog Dobbie(4, 20, KHAKI);
Fido.Speak();
Rover.WagTail();
cout << "Yorkie is " << Yorkie.GetAge() << " years old." << endl;
cout << "Dobbie weighs " << Dobbie.GetWeight() << " pounds.";
return 0;
}