emm，作者的游戏没有退出功能，并且还有许多的BUG特性 ，所以我优化了一下

https://blog.csdn.net/qq_30323637/article/details/108243122
原文在这里

优化后的第一版：添加了退出功能

#include <iostream>
using namespace std;
int main()
{
    int shengming = 30, gongji = 10, jinbi = 10, smsx = 30, duobi1 = 3;
    int a = 0, b = 0, c = 0;
    cout << "国难当道，你被选为了战士保护人民。因此您拥有以下技能：";
    for (int i = 0; i < 1; i--)
    {
        cout << endl
             << "1.购买装备和恢复生命。" << endl;
        cout << "2.打怪专区。" << endl;
        cout << "3.个人信息。" << endl;
        cout << "4.退出游戏。" << endl
             << "输入：";
        cin >> a;
        if (a == 1)
        {
            while (1)
            {
                cout << endl
                     << "你的信息：（生命" << shengming << "),（攻击" << gongji << "）,(金币" << jinbi << "）" << endl;
                cout << "1.武器 金币>=10" << endl;
                cout << "2.生命 10金币+满。" << endl;
                cout << "3.生命上线 金币>=40" << endl;
                cout << "4.躲避次数+1 15金币" << endl;
                cout << "按0退出。" << endl
                     << "输入：";
                cin >> b;
                if (b == 1 && jinbi >= 10)
                {
                    while (1)
                    {
                        cout << endl
                             << "1.石剑——10金币+5" << endl;
                        cout << "2.铁剑——50金币+25" << endl;
                        cout << "3.钻石剑——200金币+100" << endl;
                        cout << "4.神灵剑——1000金币+500" << endl;
                        cout << "0退出。" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1 && jinbi >= 10)
                        {
                            gongji += 5;
                            jinbi -= 10;
                            cout << "攻击:" << gongji - 5 << "+5=" << gongji << endl;
                        }
                        else if (c == 2 && jinbi >= 50)
                        {
                            gongji += 25;
                            jinbi -= 50;
                            cout << "攻击:" << gongji - 25 << "+25=" << gongji << endl;
                        }
                        else if (c == 3 && jinbi >= 200)
                        {
                            gongji += 100;
                            jinbi -= 200;
                            cout << "攻击:" << gongji - 100 << "+100=" << gongji << endl;
                        }
                        else if (c == 4 && jinbi >= 1000)
                        {
                            gongji += 500;
                            jinbi -= 1000;
                            cout << "攻击:" << gongji - 500 << "+500=" << gongji << endl;
                        }
                        else if (c == 0)
                        {
                            break;
                        }
                        else if (c > 3)
                        {
                            cout << "没有这个按键。" << endl;
                        }
                        else
                        {
                            cout << "金币不够。" << endl
                                 << endl;
                        }
                    }
                }
                else if (b == 2 && jinbi >= 10)
                {
                    shengming = smsx;
                    jinbi -= 10;
                    cout << "生命=" << smsx << endl;
                }
                else if (b == 3 && jinbi >= 40)
                {
                    while (1)
                    {
                        cout << endl
                             << "1.生命上线四等——40金币+10" << endl;
                        cout << "2.生命上线三等——100金币+25" << endl;
                        cout << "3.生命上线二等——400金币+100" << endl;
                        cout << "4.生命上线一等——2000金币+500" << endl;
                        cout << "0退出。" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            smsx += 10;
                            shengming += 10;
                            jinbi -= 40;
                            cout << "生命上线:" << smsx - 10 << "+10=" << smsx << endl;
                        }
                        else if (c == 2 && jinbi >= 100)
                        {
                            smsx += 25;
                            shengming += 25;
                            jinbi -= 100;
                            cout << "生命上线:" << smsx - 25 << "+25=" << smsx << endl;
                        }
                        else if (c == 3 && jinbi >= 400)
                        {
                            smsx += 100;
                            shengming += 100;
                            jinbi -= 400;
                            cout << "生命上线:" << smsx - 100 << "+100=" << smsx << endl;
                        }
                        else if (c == 4 && jinbi >= 2000)
                        {
                            smsx += 500;
                            shengming += 500;
                            jinbi -= 2000;
                            cout << "生命上线:" << smsx - 500 << "+500=" << smsx << endl;
                        }
                        else if (c == 0)
                        {
                            break;
                        }
                        else
                        {
                            cout << "金币不够。" << endl
                                 << endl;
                        }
                    }
                }
                else if (b == 4 && jinbi >= 20)
                {
                    duobi1 += 1;
                    jinbi -= 15;
                    cout << "躲避次数+1=" << duobi1 << endl;
                }
                else if (b == 0)
                {
                    break;
                }
                else
                {
                    cout << "金币不够。" << endl;
                }
            }
        }
        else if (a == 2)
        {
            while (1)
            {
                cout << endl
                     << "1.地方小怪——生命20,攻击10,可获得金币10" << endl;
                cout << "2.地方大怪——生命100,攻击25,可获得金币25" << endl;
                cout << "3.小怪——生命400,攻击100,可获得金币100" << endl;
                cout << "4.大怪——生命1000,攻击500,可获得金币500" << endl;
                cout << "0退出。" << endl
                     << "输入：";
                cin >> b;
                if (b == 1)
                {
                    int sm = 20, gj = 10;
                    int duobi = duobi1;
                    cout << endl
                         << "地方小怪——生命20,攻击10,可获得金币10" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")可让怪物生命-5" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (duobi > 0)
                        {
                            cout << "躲避成功。" << endl;
                            duobi--;
                            sm -= 5;
                            cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                        }
                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            return 0;
                        }
                    }
                    jinbi += 10;
                    cout << "恭喜您获得金币10" << endl;
                }
                else if (b == 2)
                {
                    cout << endl
                         << "地方大怪——生命100,攻击25,可获得金币25" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    int sm = 100, gj = 25;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (duobi > 0)
                        {
                            cout << "躲避成功。" << endl;
                            duobi--;
                            sm -= 5;
                            cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                        }
                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            return 0;
                        }
                    }
                    jinbi += 25;
                    cout << "恭喜您获得金币25" << endl;
                }
                else if (b == 3)
                {
                    cout << endl
                         << "小怪——生命400,攻击100,可获得金币100" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    int sm = 400, gj = 100;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (duobi > 0)
                        {
                            cout << "躲避成功。" << endl;
                            duobi--;
                            sm -= 5;
                            cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                        }
                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            return 0;
                        }
                    }
                    jinbi += 100;
                    cout << "恭喜您获得金币100" << endl;
                }
                else if (b == 4)
                {
                    cout << endl
                         << "大怪——生命1000,攻击500,可获得金币500" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    int sm = 1000, gj = 500;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (duobi > 0)
                        {
                            cout << "躲避成功。" << endl;
                            duobi--;
                            sm -= 5;
                            cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                        }
                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            return 0;
                        }
                    }
                    jinbi += 100;
                    cout << "恭喜您获得金币500" << endl;
                }
                else if (b == 0)
                {
                    break;
                }
            }
        }
        else if (a == 3)
        {
            cout << endl
                 << "你的生命：" << shengming << endl;
            cout << "你的攻击：" << gongji << endl;
            cout << "你的金币：" << jinbi << endl;
            cout << "防御次数：" << duobi1 << endl;
            cout << "生命上限：" << smsx << endl;
        }
        else if (a == 4)
        {
            cout << "游戏已退出。" << endl;
            system("pause");
            return 0;
        }
    }
    return 0;
}

优化后的第二版：修复了几个BUG 特性，分别为：

1.修改了不合理的文字和错别字
2.优化了战斗，不会再出现死循环或者无限躲避
3.添加了魔王，战胜后即可通关
4.修正了战胜获得金币的数量
5.更加银杏化的购买界面
6.死亡后不会立即退出游戏，会在按下按键后退出
7.修改了剧情（就四个字 ㄟ( ▔, ▔ )ㄏ）

#include <iostream>
using namespace std;
int main()
{
    int shengming = 30, gongji = 10, jinbi = 10, smsx = 30, duobi1 = 3;
    int a = 0, b = 0, c = 0, d = 0;
    cout << "魔王出世，国难当道，你被选为了战士保护人民。因此您拥有以下技能：";
    for (int i = 0; i < 1; i--)
    {
        cout << endl
             << "1.购买装备和恢复生命。" << endl;
        cout << "2.打怪专区。" << endl;
        cout << "3.个人信息。" << endl;
        cout << "4.退出游戏。" << endl
             << "输入：";
        cin >> a;
        if (a == 1)
        {
            while (1)
            {
                cout << endl
                     << "你的信息：（生命" << shengming << "),（攻击" << gongji << "）,(金币" << jinbi << "）" << endl;
                cout << "1.武器 金币>=10" << endl;
                cout << "2.生命 10金币+满" << endl;
                cout << "3.生命上限 金币>=40" << endl;
                cout << "4.躲避 金币>=15" << endl;
                cout << "0.退出。" << endl
                     << "输入：";
                cin >> b;
                if (b == 1 && jinbi >= 10)
                {
                    while (1)
                    {
                        cout << endl
                             << "1.石剑——10金币+5" << endl;
                        cout << "2.铁剑——50金币+25" << endl;
                        cout << "3.钻石剑——200金币+100" << endl;
                        cout << "4.神灵剑——1000金币+500" << endl;
                        cout << "0.退出。" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1 && jinbi >= 10)
                        {
                            gongji += 5;
                            jinbi -= 10;
                            cout << "攻击:" << gongji - 5 << "+5=" << gongji << endl;
                        }
                        else if (c == 2 && jinbi >= 50)
                        {
                            gongji += 25;
                            jinbi -= 50;
                            cout << "攻击:" << gongji - 25 << "+25=" << gongji << endl;
                        }
                        else if (c == 3 && jinbi >= 200)
                        {
                            gongji += 100;
                            jinbi -= 200;
                            cout << "攻击:" << gongji - 100 << "+100=" << gongji << endl;
                        }
                        else if (c == 4 && jinbi >= 1000)
                        {
                            gongji += 500;
                            jinbi -= 1000;
                            cout << "攻击:" << gongji - 500 << "+500=" << gongji << endl;
                        }
                        else if (c == 0)
                        {
                            break;
                        }
                        else if (c > 3)
                        {
                            cout << "没有这个按键。" << endl;
                        }
                        else
                        {
                            cout << "金币不够。" << endl
                                 << endl;
                        }
                    }
                }
                else if (b == 2 && jinbi >= 10)
                {
                    shengming = smsx;
                    jinbi -= 10;
                    cout << "生命=" << smsx << endl;
                }
                else if (b == 3 && jinbi >= 40)
                {
                    while (1)
                    {
                        cout << endl
                             << "1.一级生命上限——40金币+10" << endl;
                        cout << "2.二级生命上限——100金币+25" << endl;
                        cout << "3.三级生命上限——400金币+100" << endl;
                        cout << "4.四级生命上限——2000金币+500" << endl;
                        cout << "0.退出。" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            smsx += 10;
                            shengming += 10;
                            jinbi -= 40;
                            cout << "生命上限:" << smsx - 10 << "+10=" << smsx << endl;
                        }
                        else if (c == 2 && jinbi >= 100)
                        {
                            smsx += 25;
                            shengming += 25;
                            jinbi -= 100;
                            cout << "生命上限:" << smsx - 25 << "+25=" << smsx << endl;
                        }
                        else if (c == 3 && jinbi >= 400)
                        {
                            smsx += 100;
                            shengming += 100;
                            jinbi -= 400;
                            cout << "生命上限:" << smsx - 100 << "+100=" << smsx << endl;
                        }
                        else if (c == 4 && jinbi >= 2000)
                        {
                            smsx += 500;
                            shengming += 500;
                            jinbi -= 2000;
                            cout << "生命上限:" << smsx - 500 << "+500=" << smsx << endl;
                        }
                        else if (c == 0)
                        {
                            break;
                        }
                        else
                        {
                            cout << "金币不够。" << endl
                                 << endl;
                        }
                    }
                }
                else if (b == 4 && jinbi >= 15)
                {
                    while (1)
                    {
                        cout << endl
                             << "1.一级躲避——15金币+1" << endl;
                        cout << "2.二级躲避——150金币+10" << endl;
                        cout << "3.三级躲避——300金币+20" << endl;
                        cout << "4.四级躲避——1500金币+100" << endl;
                        cout << "0.退出。" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            duobi1 += 1;
                            jinbi -= 15;
                            cout << "躲避次数:" << duobi1 - 1 << "+1=" << duobi1 << endl;
                        }
                        else if (c == 2 && jinbi >= 100)
                        {
                            duobi1 += 10;
                            jinbi -= 150;
                            cout << "躲避次数:" << duobi1 - 10 << "+10=" << duobi1 << endl;
                        }
                        else if (c == 3 && jinbi >= 400)
                        {
                            duobi1 += 20;
                            jinbi -= 300;
                            cout << "躲避次数:" << duobi1 - 20 << "+20=" << duobi1 << endl;
                        }
                        else if (c == 4 && jinbi >= 2000)
                        {
                            duobi1 += 100;
                            jinbi -= 1500;
                            cout << "躲避次数:" << duobi1 - 100 << "+100=" << duobi1 << endl;
                        }
                        else if (c == 0)
                        {
                            break;
                        }
                        else
                        {
                            cout << "金币不够。" << endl
                                 << endl;
                        }
                    }
                }
                else if (b == 0)
                {
                    break;
                }
                else
                {
                    cout << "金币不够。" << endl;
                }
            }
        }
        else if (a == 2)
        {
            while (1)
            {
                cout << endl
                     << "1.地方小怪——生命20,攻击10,可获得金币10" << endl;
                cout << "2.地方大怪——生命100,攻击25,可获得金币25" << endl;
                cout << "3.小怪——生命400,攻击100,可获得金币100" << endl;
                cout << "4.大怪——生命1000,攻击500,可获得金币500" << endl;
                cout << "5.魔王——生命5000,攻击1000,可获得金币1000，并通关游戏" << endl;
                cout << "0.退出。" << endl
                     << "输入：";
                cin >> b;
                if (b == 1)
                {
                    int sm = 20, gj = 10;
                    int duobi = duobi1;
                    cout << endl
                         << "地方小怪——生命20,攻击10,可获得金币10" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")可让怪物生命-5" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (c == 2)
                        {
                            if (duobi > 0)
                            {
                                cout << "躲避成功。" << endl;
                                duobi--;
                                sm -= 5;
                                cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                            }
                            else if (duobi == 0)
                            {
                                cout << "躲避失败。 受到攻击" << endl;
                                shengming -= gj;
                                cout << endl
                                     << "我的生命：" << shengming << endl;
                                cout << "敌方生命：" << sm << endl;
                            }
                        }
                        else
                        {
                            cout << "没有这个按键。" << endl;
                        }

                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            system("pause");
                            return 0;
                        }
                    }
                    jinbi += 10;
                    cout << "恭喜您获得金币10" << endl;
                }
                else if (b == 2)
                {
                    cout << endl
                         << "地方大怪——生命100,攻击25,可获得金币25" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    int sm = 100, gj = 25;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")可让怪物生命-5" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (c == 2)
                        {
                            if (duobi > 0)
                            {
                                cout << "躲避成功。" << endl;
                                duobi--;
                                sm -= 5;
                                cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                            }
                            else if (duobi == 0)
                            {
                                cout << "躲避失败。 受到攻击" << endl;
                                shengming -= gj;
                                cout << endl
                                     << "我的生命：" << shengming << endl;
                                cout << "敌方生命：" << sm << endl;
                            }
                        }
                        else
                        {
                            cout << "没有这个按键。" << endl;
                        }

                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            system("pause");
                            return 0;
                        }
                    }
                    jinbi += 100;
                    cout << "恭喜您获得金币100" << endl;
                }
                else if (b == 4)
                {
                    cout << endl
                         << "大怪——生命1000,攻击500,可获得金币500" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS怪物" << endl;
                    int sm = 1000, gj = 500;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")可让怪物生命-5" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "敌方生命：" << sm << endl;
                        }
                        else if (c == 2)
                        {
                            if (duobi > 0)
                            {
                                cout << "躲避成功。" << endl;
                                duobi--;
                                sm -= 5;
                                cout << "敌人生命：" << sm + 5 << "-5=" << sm << endl;
                            }
                            else if (duobi == 0)
                            {
                                cout << "躲避失败。 受到攻击" << endl;
                                shengming -= gj;
                                cout << endl
                                     << "我的生命：" << shengming << endl;
                                cout << "敌方生命：" << sm << endl;
                            }
                        }
                        else
                        {
                            cout << "没有这个按键。" << endl;
                        }

                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            system("pause");
                            return 0;
                        }
                    }
                    jinbi += 500;
                    cout << "恭喜您获得金币500" << endl;
                }
                else if (b == 5)
                {
                    cout << endl
                         << "魔王——生命5000,攻击1000,可获得金币1000，并通关游戏" << endl
                         << "你的攻击力：" << gongji << " "
                         << "生命力：" << shengming << endl
                         << endl
                         << "开始 你VS魔王" << endl;
                    int sm = 5000, gj = 1000;
                    int duobi = duobi1;
                    while (sm > 0)
                    {
                        cout << endl
                             << "1.攻击 2.躲避(" << duobi << ")可让魔王生命-5" << endl
                             << "输入：";
                        cin >> c;
                        if (c == 1)
                        {
                            shengming -= gj;
                            sm -= gongji;
                            cout << endl
                                 << "我的生命：" << shengming << endl;
                            cout << "魔王生命：" << sm << endl;
                        }
                        else if (c == 2)
                        {
                            if (duobi > 0)
                            {
                                cout << "躲避成功。" << endl;
                                duobi--;
                                sm -= 5;
                                cout << "魔王生命：" << sm + 5 << "-5=" << sm << endl;
                            }
                            else if (duobi == 0)
                            {
                                cout << "躲避失败。 受到攻击" << endl;
                                shengming -= gj;
                                cout << endl
                                     << "我的生命：" << shengming << endl;
                                cout << "敌方生命：" << sm << endl;
                            }
                        }
                        else
                        {
                            cout << "没有这个按键。" << endl;
                        }

                        if (shengming <= 0)
                        {
                            cout << "你死了。" << endl;
                            system("pause");
                            return 0;
                        }
                    }
                    jinbi += 1000;
                    cout << "恭喜您打败魔王，通关了游戏！" << endl;
                    system("pause");
                    return 0;
                }
                else if (b == 0)
                {
                    break;
                }
            }
        }
        else if (a == 3)
        {
            cout << endl
                 << "你的生命：" << shengming << endl;
            cout << "你的攻击：" << gongji << endl;
            cout << "你的金币：" << jinbi << endl;
            cout << "防御次数：" << duobi1 << endl;
            cout << "生命上限：" << smsx << endl;
        }
        else if (a == 4)
        {
            cout << "游戏已退出。" << endl;
            system("pause");
            return 0;
        }
    }
    return 0;
}

话说这BUG稍微一修就修出这么多
肯定是我太厉害了
（不知道算不算侵权，侵权就删了吧。）