c语言中struct和c++中class实例对比

不念不忘少年蓝@ 2022-05-09 08:54 280阅读 0赞

# 前言 #

实现游戏中简单的打怪升级的功能

# c语言中的struct #

#include <stdio.h>
    
    typedef void(*Train)(struct player*, int);
    typedef void(*Pk)(struct player*, struct player*);
    
    struct player
    {
        int level;   //等级
        int hp;      //hp值
        Train f_train;  //函数指针(练级)
        Pk f_pk;        //函数指针(PK)
    };
    
    void train_fun(struct player *p1, int nums)
    {
        int killnums = p1->hp > nums ? nums: p1->hp;
        p1->level += killnums;
        p1->hp -= killnums;
        printf("练级：长了%d级", killnums);
        printf("当前：level=%d, hp=%d\n", p1->level, p1->hp);
    }
    
    
    void pk_fun(struct player *p1, struct player *p2)
    {
        int power1 = p1->level * 100 + p1->hp;
        int power2 = p2->level * 100 + p2->hp;
        if (power1 >= power2)
        {
            printf("player1 win\n");
        }
        else
        {
            printf("player2 win\n");
        }
    
    }
    
    
    int main()
    {
        struct player p1 =
                {.level = 1, .hp = 100, .f_train = train_fun, .f_pk = pk_fun};
        struct player p2 =
                {.level = 2, .hp = 50, .f_train = train_fun, .f_pk = pk_fun};
        p1.f_train(&p1, 6);
        p2.f_train(&p2, 10);
        p1.f_pk(&p1, &p2);
        return 0;
    }

# c++中的 class #

#include <iostream>
    using namespace std;
    
    class player
    {
    public:
        player(int level=0, int hp=0)
        :level(level), hp(hp){}
    
        void train(int nums)
        {
            int killnums = hp > nums ? nums : hp;
            level += killnums;
            hp -= killnums;
            cout << "练级:长了" << killnums << " 级。";
            cout << "当前:level=" << level << ",hp=" << hp << endl;
        }
    
        void pk(player &another)
        {
            int power1 = level * 100 + hp;
            int power2 = another.level * 100 + another.hp;
            if (power1 >= power2)
            {
                cout << "You win" << endl;
            }
            else
            {
                cout << "You loss" << endl;
            }
        }
    
    private:
        int level;
        int hp;
    };
    
    int main()
    {
        player p1(1, 100);
        player p2(2, 50);
        p1.train(6);
        p2.train(10);
        p1.pk(p2);
        return 0;
    }