20230729 猜数字（摸鱼的产物）

#include <iostream>
#include <random>
#include <Windows.h>

int digit = 4;

int main() {

    //随机数
    std::default_random_engine seed;
    std::uniform_int_distribution<int> random(0, 9);//0-9闭区间的随机数
    seed.seed(time(nullptr));

    //猜数字
    while (true) {

        //输入位数
        while (true) {
            std::cout << "How many digits would you like to guess?" << std::endl
                      << "Please enter a number greater than 0 and less than 1000." << std::endl;
            std::cin >> digit;
            if (digit >= 0 && digit <= 5) {
                break;
            } else if (digit >= 0 && digit <= 1000) {
                std::cout << "Are you sure?" << std::endl
                          << "If you are sure, enter 1, otherwise enter 0." << std::endl;
                std::string sure;
                std::cin >> sure;
                if (sure == "1") {
                    break;
                }
            } else {
                std::cout << "Input error, please re-enter." << std::endl;
            }
        }
        system("cls");

        std::cout << "If you want to quit the game, type -1." << std::endl
                  << "If you want to regenerate, enter -2." << std::endl;

        bool visNum[10] = {false, false, false, false, false, false, false, false, false, false};

        //生成digit位随机数
        int randomNum[1005] = {0};
        for (int i = 0; i < digit; i++) {
            randomNum[i] = random(seed);
            visNum[randomNum[i]] = true;
        }

        bool finish = false;

        //猜数字
        while (true) {
            std::string input;
            std::cin >> input;
            if (input == "-1") {
                goto GAME_OVER;
            } else if (input == "-2") {
                break;
            } else if (input.length() != digit) {
                std::cout << "Your input is wrong, please re-enter." << std::endl;
            } else {
                int guessNum[1005] = {0};
                for (int i = 0; i < digit; i++) {
                    guessNum[i] = input[i] - '0';
                }
                int hasNumCnt = 0;
                int rightNumCnt = 0;
                for (int i = 0; i < digit; i++) {
                    if (visNum[guessNum[i]]) {
                        if (guessNum[i] == randomNum[i]) {
                            rightNumCnt += 1;
                        } else {
                            hasNumCnt += 1;
                        }
                    }
                }
                if (rightNumCnt == digit) {
                    finish = true;
                    break;
                } else {
                    std::cout << "The number of correct numbers but incorrect positions is " << hasNumCnt << " ."
                              << std::endl;
                    std::cout << "The exact number is " << rightNumCnt << " ." << std::endl;
                }
            }
        }
        if (finish) {
            std::cout << "Congratulations, you got it right!" << std::endl;
            //按下空格键退出
            std::cout << "Press Space to continue the game." << std::endl;
            while (!(GetAsyncKeyState(32) & 0x8000)) {}
        }
        system("cls");
    }
    GAME_OVER:
    return 0;
}