代理模式

java

//People.java
package shiyan14;

public interface People {
    public void setAge(int Age);
    public void lovers();
}
//Proxy.java
package shiyan14;

public class Proxy implements People{
    private Real real=new Real();
    public void setReal(Real a){
        real=a;
    }
    public void setAge(int Age){
        
    }
    public void lovers(){
        if(real.getAge()<18){
            System.out.println("对不起，您还未满18岁，不能早恋！");
        }
        else{
            real.lovers();
        }
    }
}
//Real.java
package shiyan14;

public class Real implements People{
    private int age=0;
    public void setAge(int Age){
        age=Age;
    }
    public int getAge(){
        return age;
    }
    public void lovers(){
        System.out.println("已为您匹配到最佳伴侣");
    }
}
//Client.java
package shiyan14;

public class Client {
    public static void main(String[] args) {
        Proxy proxy=new Proxy();
        Real real=new Real();
        real.setAge(16);
        System.out.println("张三16岁");
        proxy.setReal(real);
        proxy.lovers();
        real.setAge(22);
        System.out.println("李四22岁");
        proxy.setReal(real);
        proxy.lovers();
    }
}



c++


#include<iostream>
using namespace std;
class People{
public:
    void setAge(int Age);
    void lovers();
};
class Real:public People{
private:
    int age;
public:
    void setAge(int Age){
        age=Age;
    }
    int getAge(){
        return age;
    }
    void lovers(){
        cout<<"已为您匹配到最佳伴侣"<<endl;
    }
};
class Proxy:public People{
private:
    Real *real;
public:
    void setReal(Real *real){
        this->real=real;
    }
    void setAge(int Age){}
    void lovers(){
        if(real->getAge()<18){
            cout<<"对不起，您还未满18周岁,不能早恋！"<<endl;
        }else{
            real->lovers();
        }
    }
};
int main(){
    Proxy *proxy=new Proxy();
    Real *real=new Real();
    real->setAge(16);
    cout<<"张三16岁"<<endl;
    proxy->setReal(real);
    proxy->lovers();
    real->setAge(22);
    cout<<"李四22岁"<<endl;
    proxy->setReal(real);
    proxy->lovers();
}