软件设计代理模式

婚介所
婚介所其实就是找对象的一个代理，请仿照我们的课堂例子“论坛权限控制代理”完成这个实际问题，其中如果年纪小于18周岁，婚介所会提示“对不起，不能早恋！”，并终止业务。

类图

java

package rjsj.no14;

public class Client {
    public static void main(String[] args) {
        AbstractPermission permission;
        permission = new MatrimonialAgency();

        System.out.println("未成年人...");
        permission.toMatch();
        System.out.println("**************************************************");
        System.out.println("年龄大于18...");
        permission.setLevel(1);
        permission.toMatch();
    }
}

package rjsj.no14;

public class MatrimonialAgency implements AbstractPermission{

    private RealPermission permission = new RealPermission();
    private int level = 0;

    @Override
    public void setLevel(int level) {
        this.level = level;
    }

    @Override
    public void toMatch() {
        if(level == 0){
            System.out.println("对不起，不能早恋！");
        } else if (level == 1){
            permission.toMatch();
        }
    }
}

package rjsj.no14;

public class RealPermission implements AbstractPermission{
    @Override
    public void setLevel(int level) {

    }

    @Override
    public void toMatch() {
        System.out.println("开始找对象");
    }
}

package rjsj.no14;

public interface AbstractPermission {
    public void setLevel(int level);
    public void toMatch();
}

C++

#include <iostream>
#include <string>
using namespace std;


class Person{
public:
    string name;
    int age;
    Person(string n,int a){
        name=n;
        age=a;
    }
};

class Center{
protected:
    string name;
public:
    Center(string n){
        name=n;
    }
    virtual void findlove(Person* person)=0;
};


class Marry:public Center{
public:
    Marry(string name):Center(name){}
    void findlove(Person* person){
        if(person->age<18){
            cout <<name<<":"<<person->name<<",不能早恋！" << endl;
        }
        else if(person->age<100){
            cout <<name<<":"<<person->name<<",我们会为您找到合适的伴侣！" << endl;
        }
    }
};



int main(){
    Center* center1,* center2;
    center1=new Marry("婚介");
    center2=new Marry("婚介");
    Person* b1=new Person("张三",29);
    Person* b2=new Person("李四",16);
    center1->findlove(b1);
    center2->findlove(b2);
    return 0;
}

运行截图