#include<bits/stdc++.h>
#include<conio.h> // 用于获取按键输入

using namespace std;

const int width = 20;
const int height = 20;
int x, y, fruitX, fruitY, score;
int tailX[100], tailY[100]; // 蛇的身体位置数组
int nTail; // 蛇的长度
enum eDirecton { STOP = 0, LEFT, RIGHT, UP, DOWN};
eDirecton dir;

void Setup() {
    dir = STOP;
    x = width / 2;
    y = height / 2;
    fruitX = rand() % width; // 在游戏区域随机生成果实
    fruitY = rand() % height;
    score = 0;
}

void Draw() {
    system("cls"); // 清屏
    for (int i = 0; i < width+2; i++)
        cout << "#";
    cout << endl;

    for (int i = 0; i < height; i++) {
        for (int j = 0; j < width; j++) {
            if (j == 0)
                cout << "#"; // 左墙
            if (i == y && j == x)
                cout << "O"; // 蛇头
            else if (i == fruitY && j == fruitX)
                cout << "F"; // 果实
            else {
                bool print = false;
                for (int k = 0; k < nTail; k++) {
                    if (tailX[k] == j && tailY[k] == i) {
                        cout << "o"; // 蛇的身体
                        print = true;
                    }
                }
                if (!print)
                    cout << " ";
            }

            if (j == width - 1)
                cout << "#"; // 右墙
        }
        cout << endl;
    }

    for (int i = 0; i < width+2; i++)
        cout << "#";
    cout << endl;
    cout << "Score:" << score << endl;
}

void Input() {
    if (_kbhit()) {
        switch (_getch()) {
            case 'a':
                dir = LEFT;
                break;
            case 'd':
                dir = RIGHT;
                break;
            case 'w':
                dir = UP;
                break;
            case 's':
                dir = DOWN;
                break;
            case 'x':
                dir = STOP;
                break;
        }
    }
}

void Logic() {
    int prevX = tailX[0];
    int prevY = tailY[0];
    int prev2X, prev2Y;
    tailX[0] = x;
    tailY[0] = y;
    for (int i = 1; i < nTail; i++) {
        prev2X = tailX[i];
        prev2Y = tailY[i];
        tailX[i] = prevX;
        tailY[i] = prevY;
        prevX = prev2X;
        prevY = prev2Y;
    }
    switch (dir) {
        case LEFT:
            x--;
            break;
        case RIGHT:
            x++;
            break;
        case UP:
            y--;
            break;
        case DOWN:
            y++;
            break;
        default:
            break; // do nothing
    }
    if (x >= width) x = 0; else if (x < 0) x = width - 1;
    if (y >= height) y = 0; else if (y < 0) y = height - 1;

    for (int i = 0; i < nTail; i++)
        if (tailX[i] == x && tailY[i] == y)
            dir = STOP; // 如果蛇咬到自己，游戏结束

    if (x == fruitX && y == fruitY) {
        score += 10;
        fruitX = rand() % width;
        fruitY = rand() % height;
        nTail++; // 吃到果实，蛇长增加
    }
}

int main() {
    Setup();
    while (dir != STOP) {
        Draw();
        Input();
        Logic();
        // 通过sleep调整游戏速度
#ifdef _WIN32
        Sleep(10); // Windows系统
#else
        usleep(10000); // Unix/Linux系统
#endif
    }
    return 0;
}

完