用dev-c++编写贪吃蛇的代码

以下是使用Dev-C++编写的贪吃蛇代码，仅供参考：

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

#define MAX_X 20
#define MAX_Y 20

int foodX, foodY;
int snakeX[100], snakeY[100];
int snakeLen = 4;
int dir = 0; // 0-上，1-右，2-下，3-左
int score = 0;

// 初始化蛇和食物位置
void init() {
    snakeX[0] = 5;
    snakeY[0] = 5;
    snakeX[1] = 5;
    snakeY[1] = 6;
    snakeX[2] = 5;
    snakeY[2] = 7;
    snakeX[3] = 5;
    snakeY[3] = 8;
    snakeLen = 4;
    dir = 0;
    srand((unsigned)time(NULL));
    foodX = rand() % MAX_X + 1;
    foodY = rand() % MAX_Y + 1;
    score = 0;
}

// 显示游戏界面
void show() {
    system("cls");
    for (int i = 0; i <= MAX_X + 1; i++) {
        printf("#");
    }
    printf("\n");
    for (int i = 1; i <= MAX_Y; i++) {
        printf("#");
        for (int j = 1; j <= MAX_X; j++) {
            if (i == foodY && j == foodX) {
                printf("F");
            } else {
                int flag = 0;
                for (int k = 0; k < snakeLen; k++) {
                    if (i == snakeY[k] && j == snakeX[k]) {
                        printf("O");
                        flag = 1;
                        break;
                    }
                }
                if (flag == 0) {
                    printf(" ");
                }
            }
        }
        printf("#\n");
    }
    for (int i = 0; i <= MAX_X + 1; i++) {
        printf("#");
    }
    printf("\n");
    printf("Score: %d\n", score);
}

// 移动蛇
void move() {
    int tailX = snakeX[snakeLen - 1];
    int tailY = snakeY[snakeLen - 1];
    for (int i = snakeLen - 1; i > 0; i--) {
        snakeX[i] = snakeX[i - 1];
        snakeY[i] = snakeY[i - 1];
    }
    if (dir == 0) {
        snakeY[0]--;
    } else if (dir == 1) {
        snakeX[0]++;
    } else if (dir == 2) {
        snakeY[0]++;
    } else if (dir == 3) {
        snakeX[0]--;
    }
    if (snakeX[0] == foodX && snakeY[0] == foodY) {
        snakeX[snakeLen] = tailX;
        snakeY[snakeLen] = tailY;
        snakeLen++;
        score++;
        foodX = rand() % MAX_X + 1;
        foodY = rand() % MAX_Y + 1;
    }
}

// 判断游戏是否结束
int isGameOver() {
    if (snakeX[0] <= 0 || snakeX[0] > MAX_X || snakeY[0] <= 0 || snakeY[0] > MAX_Y) {
        return 1;
    }
    for (int i = 1; i < snakeLen; i++) {
        if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
            return 1;
        }
    }
    return 0;
}

int main() {
    init();
    while (1) {
        show();
        move();
        if (isGameOver()) {
            printf("Game Over!\n");
            break;
        }
        Sleep(200);
        if (_kbhit()) {
            int ch = _getch();
            if (ch == 'w' || ch == 'W') {
                if (dir != 2) {
                    dir = 0;
                }
            } else if (ch == 'd' || ch == 'D') {
                if (dir != 3) {
                    dir = 1;
                }
            } else if (ch == 's' || ch == 'S') {
                if (dir != 0) {
                    dir = 2;
                }
            } else if (ch == 'a' || ch == 'A') {
                if (dir != 1) {
                    dir = 3;
                }
            }
        }
    }
    return 0;
}

该程序使用了Windows API函数`Sleep()`和`_kbhit()`，需要在`<windows.h>`头文件中声明。`Sleep()`函数可以让程序暂停一段时间，这里用于控制蛇的移动速度；`_kbhit()`函数用于检测键盘是否有输入，如果有则获取键盘输入并修改蛇的移动方向。