前言

最近一直想做珠玑妙算的小游戏，今天就给大家分享一下。

效果

系统制作

首先我们来做头文件，里面定义一个class game_system。

public

public:
	void startGame() {
    
    	PrintRules();
   	 	RunGame();
	}

private

变量

string guess, ans; //答案和猜测
int digit; //挑战位数

PrintRules

这段代码简单粗暴，用来解释规则：
系统随机生成n位的随机数，没有任意位是相同的。然后你猜一个数，猜完系统会给你两个提示。
第一个数代表数字和位置都猜对的数字个数，第二个数代表只有数字猜对的数字个数。

void PrintRules() {
    
        printf("                              MASTERMIND\n");
        printf("The rules of this game is:\n  1. The computer will randomly create a number.");
        printf("And every number in this number is different.\n");
        printf("  2. You will guess the number in each round, and the computer will give you two hints.\n");
        printf("The first number output is the number of numbers and positions guessed correctly");
        printf(", and the second number output is the number of numbers guessed correctly only.GoodLuck!\n");
    }

GetDigit

这段代码作用是获得玩家希望挑战的数字位数（3到7之间），这个值难度比较适中。当然，你可以自行根据需要调整，注意最大值不要超过10。

void GetDigit() {
    
    printf("Please enter the digit of the number ");
    printf("that you want to challange in this round of 'MASTERMIND'(3 - 7):");
    for (;;) {
    
        cin >> digit;
        if (digit <= 7 && digit >= 3) break;
        else printf("\nWrong input, please enter again\n");
    }
    printf("\n");
}

randomNumber

这段代码用来创作没有重复数位且第一位不是0的随机数

void randomNumber() {
    
    string choice = "123456789";
    srand(time(nullptr));
    int r = rand() % choice.size(); //创建从0到8的随机数做选择的下标
    ans += choice[r]; //答案后面加上随机选择的字符
    choice.erase(r, 1); //删除已选择过的选项
    choice += '0'; // 最高为不是零，将'0'加入选项
    for (int i = 1; i < digit; ++i) {
    
        srand(time(nullptr));
        r = rand() % choice.size();
        ans += choice[r];
        choice.erase(r, 1);
    }
}

获得合法输入

checkInput

bool checkInput() {
    
    string comp;
    for (int i = 0; i < guess.size(); ++i) {
    
        if (count(comp.begin(), comp.end(), guess[i]) > 0) return false; //判断是否重复
        else comp += guess[i]; //否则将遍历到的字符存入已出现字符串里
    }
    if (guess.size() != digit) return false; //若字符串大小超过选择挑战位数，返回假
    return true; //若合法，返回真
}

getInput

void getInput() {
    
    for (;;) {
    
        cin >> guess;
        if (checkInput()) break; //不停输入直到合法
        else printf("Wrong input, please enter again:");
    }
}

RunGame

函数都写完了，现在我们写运行游戏的函数。

void RunGame() {
    
    GetDigit(); //获得挑战位数
    randomNumber(); //获得随机数
    for (;;) {
    
        int all = 0, half = 0; //创建变量：数位皆猜对个数，数猜对个数
        getInput();
        for (int i = 0; i < digit; ++i) {
    
            if (ans[i] == guess[i]) ++all; //若位置和数字都猜对则提示第一个数加1
            else {
    
                for (auto j : guess) {
    
                    if (ans[i] == j) {
     //如果数字猜对则提示第二个数加1
                        ++half;
                        break;
                    }
                }
            }
        }
        if (all == digit)  {
     //若全部数位猜对，游戏胜利
            printf("Correct!");
            break;
        }
        else printf("%d%c%d\n", all, ' ', half); //否则输出提示
    }
}

头文件

#ifndef ABACUSCALCULATION_H_INCLUDED
#define ABACUSCALCULATION_H_INCLUDED

#include <iostream>
#include <algorithm>
#include <ctime>
#include <vector>
#include <string>
using namespace std;

class game_system
{
    
public:
    void startGame() {
    
        PrintRules();
        RunGame();
    }
private:
    string guess, ans;
    int digit;
    void RunGame() {
    
        GetDigit();
        randomNumber();
        for (;;) {
    
            int all = 0, half = 0;
            getInput();
            for (int i = 0; i < digit; ++i) {
    
                if (ans[i] == guess[i]) ++all;
                else {
    
                    for (auto j : guess) {
    
                        if (ans[i] == j) {
    
                            ++half;
                            break;
                        }
                    }
                }
            }
            if (all == digit)  {
    
                printf("Correct!");
                break;
            }
            else printf("%d%c%d\n", all, ' ', half);
        }
    }
    void PrintRules() {
    
        printf("                              MASTERMIND\n");
        printf("The rules of this game is:\n  1. The computer will randomly create a number.");
        printf("And every number in this number is different.\n");
        printf("  2. You will guess the number in each round, and the computer will give you two hints.\n");
        printf("The first number output is the number of numbers and positions guessed correctly");
        printf(", and the second number output is the number of numbers guessed correctly only.GoodLuck!\n");
    }
    void GetDigit() {
    
        printf("Please enter the digit of the number ");
        printf("that you want to challange in this round of 'MASTERMIND'(3 ¡ª 7):");
        for (;;) {
    
            cin >> digit;
            if (digit <= 7 && digit >= 3) break;
            else printf("\nWrong input, please enter again\n");
        }
        printf('\n');
    }
    void randomNumber() {
    
        string choice = "123456789";
        srand(time(nullptr));
        int r = rand() % choice.size();
        ans += choice[r];
        choice.erase(r, 1);
        choice += '0';
        for (int i = 1; i < digit; ++i) {
    
            srand(time(nullptr));
            r = rand() % choice.size();
            ans += choice[r];
            choice.erase(r, 1);
        }
    }
    bool checkInput() {
    
        string comp = "";
        for (int i = 0; i < guess.size(); ++i) {
    
            if (count(comp.begin(), comp.end(), guess[i]) > 0) return false;
            else comp += guess[i];
        }
        return guess.size() == digit;
        return true;
    }
    void getInput() {
    
        for (;;) {
    
            cin >> guess;
            if (checkInput()) break;
            else printf("Wrong input, please enter again:");
        }
    }
};

#endif // ABACUSCALCULATION_H_INCLUDED

请将此文件存放于正确的路径：xxx\MinGW\lib\gcc\x86_64-w64-mingw32\8.1.0\include\c++
这个路径是Codeblocks::IDE的路径，如有其他需求请自行调整。
否则也可以随便放一个位置然后

#include <盘名:\\路径\AbacusCalculation.h>

main()

最后，创建新的C++源文件，代码如下：

#include <AbacusCalculation.h> // 路径名请自行调整

int main() {
    
    game_system game;
    game.startGame();
}

Github 源代码链接

github