C++/java 继承类的多态详解及实例代码

//测试继承与多态
class Animal {

public:
 char name[128];
 char behavior[128];

 void outPut() {
  cout << "Animal" << endl;
 }

 void outPutAnimal() {
  cout << "Father" << endl;
 }

 Animal() {
  strcpy(name, "Animal");
  strcpy(behavior, "Call");
 }
};

class Dog: public Animal {

public:
 //子类定义一个和父类相同的属性
 char name[128];
 char sex;

 //子类重写父类方法
 void outPut() {
  cout << "Dog" << endl;
 }

 void outPutDog() {
  cout << "Son" << endl;
 }

 Dog() {
  strcpy(name, "Dog");
  sex = 'M';
 }
};

/*
没有多态的情况下测试结果和Java相同
 Dog dog;
 cout << dog.name << endl;
 cout << dog.sex << endl;
 cout << dog.behavior << endl;
 dog.outPut();
 dog.outPutAnimal();
 dog.outPutDog();

 //可通过如下方式访问父类的行为
 dog.Animal::outPut();
*/

//多态的情况下：
 Animal *dog = new Dog;

 cout << dog->name << endl;
 cout << dog->behavior << endl;
 dog->outPut();
 dog->outPutAnimal();

//测试结果
Animal
Call
Animal
Father

//父类
public class Animal {

 public String name = "Animal";
 public String behavior = "Call";

 public void outPut() {
  System.out.println("Animal");
 }

 public void outPutAnimal() {
  System.out.println("Father");
 }
}

//子类
public class Dog extends Animal{

 public String name = "Dog";
 public char sex = 'M';

 public void outPut() {
  System.out.println("Dog");
 }

 public void outPutDog() {
  System.out.println("Son");
 }
}

public static void main(String[] args) {

 Animal dog = new Dog();

 System.out.println(dog.name);
 System.out.println(dog.behavior);
 dog.outPut();
 dog.outPutAnimal();

}

//测试结果
Animal//父类行为
Call
Dog//表现的是子类的行为
Father