用C语言写一个贪吃蛇游戏 并写出代码

以下是用C语言编写的简单贪吃蛇游戏代码：

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

#define WIDTH 40
#define HEIGHT 20

int score = 0, gameover = 0;
int x, y, fruitX, fruitY, tailX[100], tailY[100], nTail;

enum eDirection {STOP = 0, LEFT, RIGHT, UP, DOWN};
enum eDirection dir;

void Setup() {
    srand(time(NULL));
    gameover = 0;
    dir = STOP;
    x = WIDTH / 2;
    y = HEIGHT / 2;
    fruitX = rand() % WIDTH;
    fruitY = rand() % HEIGHT;
    score = 0;
}

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

    for (int i = 0; i < HEIGHT; i++) {
        for (int 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 print = 0;
                for (int k = 0; k < nTail; k++) {
                    if (tailX[k] == j && tailY[k] == i) {
                        printf("o");
                        print = 1;
                    }
                }
                if (!print) {
                    printf(" ");
                }
            }
            if (j == WIDTH - 1) {
                printf("#");
            }
        }
        printf("\n");
    }

    for (int i = 0; i < WIDTH + 2; i++) {
        printf("#");
    }
    printf("\n");
    printf("Score: %d\n", score);
}

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':
                gameover = 1;
                break;
        }
    }
}

void Logic() {
    int prevX = tailX[0], prevY = tailY[0], 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;
    }
    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) {
            gameover = 1;
        }
    }
    if (x == fruitX && y == fruitY) {
        score += 10;
        fruitX = rand() % WIDTH;
        fruitY = rand() % HEIGHT;
        nTail++;
    }
}

int main() {
    Setup();
    while (!gameover) {
        Draw();
        Input();
        Logic();
        Sleep(50);
    }
    return 0;
}

该代码使用了Windows.h库中的Sleep函数来控制游戏帧率，同时也使用了conio.h库中的_kbhit和_getch函数来检测键盘输入。在游戏主循环中，游戏通过Draw、Input和Logic三个函数来实现游戏的绘制、输入和逻辑更新。其中，逻辑更新部分实现了蛇的移动、碰撞检测和果实的生成等功能。