用c写一个贪吃蛇游戏

以下是一个用C语言编写的简单贪吃蛇游戏的示例：

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <windows.h>

#define WIDTH 20
#define HEIGHT 20

int i, j, k;
int gameOver;
int score;
int x, y;
int fruitX, fruitY;
int tailX[100], tailY[100];
int tailLength;
int dir;
int speed;

void Setup()
{
    gameOver = 0;
    score = 0;
    x = WIDTH / 2;
    y = HEIGHT / 2;
    fruitX = rand() % WIDTH;
    fruitY = rand() % HEIGHT;
    tailLength = 0;
    dir = 0;
    speed = 100;
}

void Draw()
{
    system("cls");
    for (i = 0; i < WIDTH + 2; i++)
        printf("#");
    printf("\n");

    for (i = 0; i < HEIGHT; i++)
    {
        for (j = 0; j < WIDTH; j++)
        {
            if (j == 0)
                printf("#");
            if (i == y && j == x)
                printf("O");
            else if (i == fruitY && j == fruitX)
                printf("F");
            else
            {
                int printTail = 0;
                for (k = 0; k < tailLength; k++)
                {
                    if (tailX[k] == j && tailY[k] == i)
                    {
                        printf("o");
                        printTail = 1;
                    }
                }
                if (!printTail)
                    printf(" ");
            }
            if (j == WIDTH - 1)
                printf("#");
        }
        printf("\n");
    }

    for (i = 0; i < WIDTH + 2; i++)
        printf("#");
    printf("\n");

    printf("Score: %d\n", score);
}

void Input()
{
    if (_kbhit())
    {
        switch (_getch())
        {
        case 'a':
            dir = 1;
            break;
        case 'd':
            dir = 2;
            break;
        case 'w':
            dir = 3;
            break;
        case 's':
            dir = 4;
            break;
        case 'x':
            gameOver = 1;
            break;
        }
    }
}

void Logic()
{
    int prevX = tailX[0];
    int prevY = tailY[0];
    int prev2X, prev2Y;
    tailX[0] = x;
    tailY[0] = y;
    for (i = 1; i < tailLength; i++)
    {
        prev2X = tailX[i];
        prev2Y = tailY[i];
        tailX[i] = prevX;
        tailY[i] = prevY;
        prevX = prev2X;
        prevY = prev2Y;
    }

    switch (dir)
    {
    case 1:
        x--;
        break;
    case 2:
        x++;
        break;
    case 3:
        y--;
        break;
    case 4:
        y++;
        break;
    }

    // 边界检测
    if (x >= WIDTH)
        x = 0;
    else if (x < 0)
        x = WIDTH - 1;
    if (y >= HEIGHT)
        y = 0;
    else if (y < 0)
        y = HEIGHT - 1;

    // 自身碰撞检测
    for (i = 0; i < tailLength; i++)
    {
        if (tailX[i] == x && tailY[i] == y)
        {
            gameOver = 1;
            break;
        }
    }

    // 食物检测
    if (x == fruitX && y == fruitY)
    {
        score += 10;
        fruitX = rand() % WIDTH;
        fruitY = rand() % HEIGHT;
        tailLength++;
        if (speed > 10)
            speed -= 10;
    }
}

int main()
{
    Setup();
    while (!gameOver)
    {
        Draw();
        Input();
        Logic();
        Sleep(speed);
    }
    printf("Game Over\n");
    return 0;
}

这个示例使用了Windows的conio.h库来实现键盘输入和控制台清屏功能，所以只能在Windows系统上运行。如果你在其他操作系统上使用，可能需要使用其他库来实现类似的功能