小游戏贪吃蛇

操作说明：通过键盘上的左键和右键控制“蛇头”向左或者向右移动，基本玩法和游戏规则与贪吃蛇是一致的。(想象自己是“蛇头”，面向前面进行左右操作)

#include 
#include 
#include 
#include 
using namespace std;

#include 

int nScreenWidth = 120;
int nScreenHeight = 30;

struct sSnakeSegment
{
    int x;
    int y;
};

int main()
{
    //Create Screen Buffer
    char *screen = new char[nScreenWidth * nScreenHeight];
    for (int i = 0; i != nScreenWidth * nScreenHeight; i++)
        screen[i] = ' ';
    HANDLE hConsole = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
    SetConsoleActiveScreenBuffer(hConsole);
    DWORD dwBytesWritten = 0;

    while (1)
    {

        list<sSnakeSegment> snake = {{60, 15}, {61, 15}, {62, 15}, {63, 15}, {64, 15}, {65, 15}, {66, 15}, {67, 15}, {68, 15}, {69, 15}};
        int nFoodX = 30;
        int nFoodY = 15;
        int nScore = 0;
        int nSnakeDirection = 3;
        bool bDead = false;
        bool bKeyLeft = false, bKeyRight = false, bKeyLeftOld = false, bKeyRightOld = false;

        while (!bDead)
        {
            // Timing & Input
            //this_thread::sleep_for(200ms);

            //Get Input
            auto t1 = chrono::system_clock::now();
            while ((chrono::system_clock::now() - t1) < ((nSnakeDirection % 2 == 1) ? 120ms : 200ms))
            {
                bKeyRight = (0x8000 & GetAsyncKeyState((unsigned char)('\x27'))) != 0;
                bKeyLeft = (0x8000 & GetAsyncKeyState((unsigned char)('\x25'))) != 0;

                if (bKeyRight && !bKeyRightOld)
                {
                    nSnakeDirection++;
                    if (nSnakeDirection == 4)
                        nSnakeDirection = 0;
                }
                if (bKeyLeft && !bKeyLeftOld)
                {
                    nSnakeDirection--;
                    if (nSnakeDirection == -1)
                        nSnakeDirection = 3;
                }
                bKeyLeftOld = bKeyLeft;
                bKeyRightOld = bKeyRight;
            }

            //Game Logic
            //Updata Snake position
            switch (nSnakeDirection)
            {
            case 0: //UP
                snake.push_front({snake.front().x, snake.front().y - 1});
                break;
            case 1: //RIGHT
                snake.push_front({snake.front().x + 1, snake.front().y});
                break;
            case 2: //DOWN
                snake.push_front({snake.front().x, snake.front().y + 1});
                break;
            case 3: //LEFT
                snake.push_front({snake.front().x - 1, snake.front().y});
                break;
            }

            //Collison Dection
            //For broder
            if (snake.front().x < 0 || snake.front().x > nScreenWidth)
                bDead = true;
            if (snake.front().y < 3 || snake.front().y >= nScreenHeight)
                bDead = true;

            //For Food
            if (snake.front().x == nFoodX && snake.front().y == nFoodY)
            {
                nScore++;
                while (screen[nFoodY * nScreenWidth + nFoodX] != ' ')
                { //generate a "food" within the border
                    nFoodX = rand() % nScreenWidth;
                    nFoodY = (rand() % (nScreenHeight - 3)) + 3;
                }
                for (int i = 0; i != 5; i++)
                {
                    snake.push_back({snake.back().x, snake.back().y});
                }
            }

            //For Snake
            for (list<sSnakeSegment>::iterator i = snake.begin(); i != snake.end(); i++)
                if (i != snake.begin() && i->x == snake.front().x && i->y == snake.front().y)
                    bDead = true;

            //Chop pff Snake's tail
            snake.pop_back();

            //Display to player
            //Clear Screen
            for (int i = 0; i != nScreenWidth * nScreenHeight; i++)
                screen[i] = ' ';

            //Draw Stats & Border
            for (int i = 0; i != nScreenWidth; i++)
            {
                screen[i] = '=';
                screen[2 * nScreenWidth + i] = L'=';
            }
            wsprintf(&screen[nScreenWidth + 5], "     Game name:Snake     Author:Hechun Jiang     YOUR SCORES:%d     ", nScore);

            //Draw Snake Body
            for (auto s : snake)
                screen[s.y * nScreenWidth + s.x] = bDead ? '+' : 'O';

            //Draw Snake Head
            screen[snake.front().y * nScreenWidth + snake.front().x] = bDead ? 'X' : '@';

            //Draw Food
            screen[nFoodY * nScreenWidth + nFoodX] = '%';
            if (bDead)
                wsprintf(&screen[15 * nScreenWidth + 40], "     if you want to try again, please press 'SPACE'     ");

            //Display Frame
            WriteConsoleOutputCharacter(hConsole, screen, nScreenHeight * nScreenWidth, {0, 0}, &dwBytesWritten);
        }

        //check 'space'
        while ((0x8000 & GetAsyncKeyState((unsigned char)('\x20'))) == 0)
            ;
    }

    return 0;
}