C语言项目——简易版贪吃蛇

使用工具

CLion 2022

前期准备

导入第三方库Easyx，详细教程 => 在 CLion、Dev-C++ 或 Code::Blocks 下面配置 EasyX（2023-7-23 更新） - CodeBus

运行效果

代码实现

/*
 * 1. 定义蛇结构
 * 2. 定义食物结构
 * 3. 游戏初始化
 * 4. 蛇行进
 * 5. 按键控制（方向，暂停）
 * 6. 吃食物
 * 7. 死亡判定
 */

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

#define LENGTH_MAX 100  // 蛇的最大长度
enum DIR{   // 方向
    W, S, A, D
};

struct Snake{
    // 蛇的长度，行进方向，行进速度，以及所在位置（坐标）
    int length;
    int direct;
    int speed;
    POINT coor[LENGTH_MAX];
}snake;

struct Food{
    // 食物所在位置，大小，是否被吃
    int x;
    int y;
    int r;
    int grade;
    bool flag;
}food;

void GameInit(){
    // 设置游戏窗口大小
    initgraph(648,475);
    // 设置随机数种子
    srand(GetTickCount());
    // 设置蛇的参数
    snake.length = 3;
    snake.direct = D;
    snake.speed = 10;
    for(int i = 0; i < snake.length; i++){
        snake.coor[i].x = 334-10*i;
        snake.coor[i].y = 200;
    }
    // 设置食物的参数
    food.x = rand()%638+10;
    food.y = rand()%465+10;
    food.r = rand()%8+8;
    food.grade = 0;
    food.flag = true;
}

void GameDraw(){
    // 防闪烁
    BeginBatchDraw();
    // 设置背景颜色
    setbkcolor(RGB(255,250,240));
    cleardevice();
    // 画蛇
    setfillcolor(RGB(85,107,47));
    for(int i = 0; i < snake.length; i++){
        solidcircle(snake.coor[i].x,snake.coor[i].y,5);
    }
    // 画食物
    setfillcolor(RGB(220,20,60));
    if(food.flag){
        solidcircle(food.x,food.y,food.r);
    }
    // 显示分数
    char over[100];
    setcolor(RGB(107,142,35));
    sprintf(over, "Your score is: %d", food.grade);
    outtextxy(10, 10, over);
    EndBatchDraw();
}

void SnakeMove(){
    // 从第二蛇身个开始都跟着上一个
    for(int i = snake.length-1; i > 0; i--){
        snake.coor[i] = snake.coor[i-1];
    }
    // 行进和穿墙设置
    switch (snake.direct) {
        case W:
            snake.coor[0].y -= snake.speed;
            if(snake.coor[0].y <= 0){
                snake.coor[0].y = 475;
            }
            break;
        case S:
            snake.coor[0].y += snake.speed;
            if(snake.coor[0].y >= 475){
                snake.coor[0].y = 0;
            }
            break;
        case A:
            snake.coor[0].x -= snake.speed;
            if(snake.coor[0].x <= 0){
                snake.coor[0].x = 648;
            }
            break;
        case D:
            snake.coor[0].x += snake.speed;
            if(snake.coor[0].x >= 648){
                snake.coor[0].x = 0;
            }
            break;
    }
}

void MoveControl(){
    if(_kbhit()){
        switch (_getch()) {
            // 记得设置不能原地掉头
            case 'w':
            case 'W':
            case 72:
                if(snake.direct != S){
                    snake.direct = W;
                }
                break;
            case 's':
            case 'S':
            case 80:
                if(snake.direct != W){
                    snake.direct = S;
                }
                break;
            case 'a':
            case 'A':
            case 75:
                if(snake.direct != D){
                    snake.direct = A;
                }
                break;
            case 'd':
            case 'D':
            case 77:
                if(snake.direct != A){
                    snake.direct = D;
                }
                break;
                // 设置按空格暂停
            case ' ':
                while(1){
                    if(_getch()==' '){
                        return;
                    }
                    break;
                }
        }
    }
}

void EatFood(){
    if(food.flag && abs(snake.coor[0].x-food.x) < food.r+1 && abs(snake.coor[0].y-food.y) < food.r+1 ){
        food.flag = false;
        food.grade++;
        snake.length++;
    }
//  食物刷新
    if(!food.flag){
        food.x = rand()%648;
        food.y = rand()%475;
        food.r = rand()%5+5;
        food.flag = true;
    }
}

bool snakeDie() {
    for (int i = 1; i < snake.length; ++i) {
        if (snake.coor[i].x == snake.coor[0].x && snake.coor[i].y == snake.coor[0].y) {
            return true;
        }
    }
    return false;
}

void ClearScore(){
    food.grade = 0;
}

int main() {
    int tmp;
    do{
        GameInit();
        while(!snakeDie()){
            GameDraw();
            SnakeMove();
            MoveControl();
            EatFood();
            Sleep(65); // 控制速度
        }
        // 按 0重新开始，按其他键退出游戏
        char over[100] = "Game Over! Press '0' to restart, press other to quit.";
        setcolor(RED);
        outtextxy(180, 50, over);
        setcolor(WHITE);
        system("pause");
        tmp = _getch();
    }while(tmp != 0);
    return 0;
}