C++ 贪吃蛇二维

#include <iostream>
#include <conio.h>
#include <windows.h>
#include <time.h>

int g_Dir = 3;
#define UP         0
#define DOWN  1
#define LEFT       2
#define RIGHT   3

struct FOOD
{
    int X = 0;
    int Y = 0;
    bool State = 0;
}Food;

//方向控制
void SnekeMove()
{
    if (::GetAsyncKeyState(VK_UP) & 1)
        g_Dir = 0;
    if (::GetAsyncKeyState(VK_DOWN) & 1)
        g_Dir = 1;
    if (::GetAsyncKeyState(VK_LEFT) & 1)
        g_Dir = 2;
    if (::GetAsyncKeyState(VK_RIGHT) & 1)
        g_Dir = 3;
}

//主函数
int main()
{
    srand((unsigned int)time(NULL));
    int W = 20;
    int H = 20;
    int Len = 3;
    int Map[20][20] = { 0 };
    int Snake[50][2] = { 0 };
    //Snake[0] = 2;//为蛇头
    
    for (int i = 0; i < Len; i++)
    {
        Snake[i][0] = Len - i - 1;
    }
    Food.X = W / 2;
    Food.Y = H / 2;
    Map[Food.Y][Food.X] = 2;

    const char *SNAKE[] = { "  ", "■" ,"★"};
    while (true)
    {
        system("cls");
        int x = 0;
        int y = 0;
        for (int i = 0; i < Len; i++)
        {
            // 2 1 0
            // 1 1 1

            // 3 2 1
            // 0 1 1 1
            //这里需要注意
            x = Snake[i][0];
            y = Snake[i][1];
            //这里取决于对二维数组的理解
            //虽然Y始终为0
            //Map[y] 为首地址
            //经过推理得到这几种写法
            //*(Map[y] + x) = 1;
            //Map[y][x] = 1;
            *(Map[0] + x) = 1;
            //Map[0][x] = 1;
        }
        for (int i = 0; i < H; i++)
        {
            for (int j = 0; j < W; j++)
            {
                std::cout << SNAKE[Map[i][j]];
            }
            std::cout << std::endl;
        }
        memset(Map, 0, sizeof(Map));
        SnekeMove();
        for (int i = Len; i > 0; i--)
        {
            Snake[i][0] = Snake[i - 1][0];
        }

        if (g_Dir == UP)
        {
            Snake[0][0] -= W;
        }
        if (g_Dir == DOWN)
        {
            Snake[0][0] += W;
        }
        if (g_Dir == LEFT)
        {
            Snake[0][0]--;
        }
        if (g_Dir == RIGHT)
        {
            Snake[0][0]++;
        }

        Sleep(50);
    }


    //https://www.bilibili.com/video/av29007126/?spm_id_from=333.788.videocard.1
    system("pause");
    return 0;
}