贪吃蛇easyx版本

这学期学了图形交互学，三个星期下来，突然意识到已经可以用c++写一个贪吃蛇了。

于是就用了两天写了这个小游戏。

其中一天写了核心代码，半天找核心代码中的bug，还有半天进行了界面及操作的优化。

但是有些代码写的依旧有些累赘，比如难度选择界面，不停用if语句，代码太杂了，但是也懒得去优化了，毕竟还有很多事情要做。

下面是游戏运行程序，建议在win10下运行，因为找了几个win7win8系统的童鞋貌似都不能运行，给了他们运行库，运行库也安装不上去。

点击这里下载游戏源程序。

下面是游戏界面截图。

好了接下来就贴出这些代码。仅供参考。

#include "stdafx.h"
#include <time.h>
#include <conio.h>
#include <graphics.h>
#include <iostream>
using namespace std;

//bug:运行游戏开始后不能按除方向键和wasd键外的其它键，不然会提示撞墙


/*画窗体边框*/
void drawBorder(bool i, int borderWidth)
{
    if (i)
    {
        setfillcolor(GREEN);
    }
    else
    {
        setfillcolor(RED);
    }
    bar(0, 0, getmaxx(), borderWidth - 1 - 1);//上边框
    bar(0, 0, borderWidth - 1 - 1, getmaxy());//左边框
    bar(getmaxx() - borderWidth + 1, 0, getmaxx(), getmaxy());//右边框
    bar(0, getmaxy() - borderWidth + 1, getmaxx(), getmaxy());//下边框
}

/*贪吃蛇结构体*/
struct Snake
{
    int snakeX;
    int snakeY;
};
void drawSnake(struct Snake snakeHeadTemp, int snakeR)
{
    setfillcolor(WHITE);
    solidcircle(snakeHeadTemp.snakeX, snakeHeadTemp.snakeY, snakeR);
}
//擦除蛇尾
bool eraseSnake(struct Snake snakeHeadTemp, struct Snake snakeTail, int snakeR, struct Snake snakeFood)
{
    if ((snakeHeadTemp.snakeX == snakeFood.snakeX) && (snakeHeadTemp.snakeY == snakeFood.snakeY))
    {
        return true;//如果相同，则返回true，说明需要重新绘制一个食物并且不擦除当前蛇尾
    }
    else
    {
        setfillcolor(BLACK);
        solidcircle(snakeTail.snakeX, snakeTail.snakeY, snakeR);
        return false;
    }
}
//检测是否和自身相撞
bool checkSnake(struct Snake *snake, struct Snake snakeHeadTemp, int * snakeLenPtr)
{
    for (int i = 0; i < *snakeLenPtr; i++)
    {
        if (((snake + i)->snakeX == snakeHeadTemp.snakeX) && ((snake + i)->snakeY == snakeHeadTemp.snakeY))
        {
            return false;
        }
    }
    return true;
}
//对数组排序
void sortSnake(struct Snake *snake, struct Snake snakeHeadTemp, int * snakeLenPtr)
{
    for (int i = *snakeLenPtr - 1; i >= 0; i--)//妈蛋，i>=0i>=0i>=0罚抄一百遍！这个bug找了整整半天啊卧槽！
    {
        (snake + i + 1)->snakeX = (snake + i)->snakeX;
        (snake + i + 1)->snakeY = (snake + i)->snakeY;
    }
    snake->snakeX = snakeHeadTemp.snakeX;
    snake->snakeY = snakeHeadTemp.snakeY;
}
//去除尾巴
void eraseTail(struct Snake snakeTail, int snakeR)
{
    setfillcolor(BLACK);
    solidcircle(snakeTail.snakeX, snakeTail.snakeY, snakeR);
}
//主函数
int main() {
    int screenX = 800;//窗口宽
    int screenY = 600;//窗口高
    int borderWidth = 20;//游戏边框宽度
    int snakeX = 50;
    int snakeY = 30;
    int snakeR = 10;
    int snakeI;//声明食物的横个数
    int snakeJ;//声明化食物的纵个数
    char ch = 'd';
    int foodCount = 0;//初始化吃掉的食物个数
    TCHAR str[100];//用于存储提示文字

    initgraph(screenX, screenY);
    int speed = 100;

    char choose;
    int hard = 1;

    restart:
    //初始化开始界面
    setfillcolor(BLUE);
    bar(0, 0, getmaxx(), getmaxy());
    setbkcolor(BLUE);
    setcolor(WHITE);
    settextstyle(30, 0, TEXT("黑体"));
    outtextxy(getmaxx() / 2 - 75, getmaxy() / 2 - 200, TEXT("英雄贪吃蛇"));
    settextstyle(15, 0, TEXT("黑体"));
    outtextxy(getmaxx() / 2 - 80, getmaxy() / 2 - 130, TEXT("请选择难度，切勿手滑"));
    setcolor(YELLOW);
    outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));//200
    outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));//200
    setcolor(WHITE);
    outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));//100
    outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));//30
    outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));//20
    outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));//退出
    settextstyle(13, 0, TEXT("黑体"));
    outtextxy(getmaxx() / 2 - 70, getmaxy() - 50, TEXT("版本 v1.1 made by cy"));

    //选择界面12 -32
    while (choose = _getch())
    {
        if (choose == -32) { choose = _getch(); }
        if (choose == 13)
        {
            if (hard == 1) { speed = 100; }
            if (hard == 2) { speed = 80; }
            if (hard == 3) { speed = 50; }
            if (hard == 4) { speed = 25; }
            if (hard == 5) { return 0; }
            break;
        }
        if (choose == 72) 
        {
            if (hard > 1) { hard--; }
            else{ hard = 5; }
        }
        if (choose == 80)
        {
            if (hard < 5) { hard++; }
            else { hard = 1; }
        }
        if (hard == 1)
        {
            settextstyle(15, 0, TEXT("黑体"));
            setcolor(BLUE);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 40, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 10, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 20, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 50, TEXT("->"));
            setcolor(YELLOW);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));
            speed = 100;
        }
        if (hard == 2)
        {
            settextstyle(15, 0, TEXT("黑体"));
            setcolor(BLUE);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 10, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 20, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 50, TEXT("->"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));
            setcolor(YELLOW);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 40, TEXT("->"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));
            speed = 80;
        }
        if (hard == 3)
        {
            settextstyle(15, 0, TEXT("黑体"));
            setcolor(BLUE);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 40, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 20, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 50, TEXT("->"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));
            setcolor(YELLOW);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 10, TEXT("->"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));
            speed = 50;
        }
        if (hard == 4)
        {
            settextstyle(15, 0, TEXT("黑体"));
            setcolor(BLUE);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 40, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 10, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 50, TEXT("->"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));
            setcolor(YELLOW);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 20, TEXT("->"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));
            speed = 25;
        }
        if (hard == 5)
        {
            settextstyle(15, 0, TEXT("黑体"));
            setcolor(BLUE);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 70, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 40, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 - 10, TEXT("->"));
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 20, TEXT("->"));
            setcolor(WHITE);
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 70, TEXT("脑残模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 40, TEXT("凡人模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 - 10, TEXT("大仙模式"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 20, TEXT("自虐模式"));
            setcolor(YELLOW);
            outtextxy(getmaxx() / 2 - 50, getmaxy() / 2 + 50, TEXT("->"));
            outtextxy(getmaxx() / 2 - 30, getmaxy() / 2 + 50, TEXT("退出游戏"));
        }
    }



    setfillcolor(BLACK);
    settextstyle(20, 0, TEXT("黑体"));
    bar(0, 0, getmaxx(), getmaxy());
    setcolor(WHITE);
    setbkcolor(BLACK);
    outtextxy(getmaxx() / 2 - 135, getmaxy()/2-50, TEXT("食物还有5秒到达战场，碾碎它们！"));
    settextstyle(15, 0, TEXT("黑体"));
    outtextxy(getmaxx() / 2 - 175, getmaxy() / 2, TEXT("小提示：除了方向键，还可以用wasd键来控制方向哦~"));
    Sleep(5000);
    bar(0, 0, getmaxx(), getmaxy());

    drawBorder(true, borderWidth);
    //初始化贪吃蛇
    setfillcolor(YELLOW);
    int snakeLen = 1; int * snakeLenPtr = &snakeLen;//蛇的节点数，默认为1，即游戏一开始就有一个蛇头
    struct Snake snake[1064];
    snake->snakeX = borderWidth + 9; snake->snakeY = borderWidth + 9;//初始化蛇头
    solidcircle(snake->snakeX, snake->snakeY, snakeR);//初始化蛇头
    struct Snake snakeTail;//定义蛇尾snakeTail以及一个暂存蛇头的变量
    struct Snake snakeHeadTemp;//snakeHeadTemp用于在进行数组向后移动的时候保证蛇头不被覆盖
    struct Snake snakeFood;//snake的食物，随机产生
    //整个游戏思路是，如果蛇头遇到了新的食物，那么不擦除蛇尾，反之则擦除蛇尾

    //随机产生一个食物
    srand(time(NULL));
    snakeI = rand() % 38 + 1;
    snakeJ = rand() % 28 + 1;
    snakeFood.snakeX = borderWidth - 11 + 20 * snakeI;
    snakeFood.snakeY = borderWidth - 11 + 20 * snakeJ;
    setfillcolor(LIGHTRED);
    solidcircle(snakeFood.snakeX, snakeFood.snakeY, snakeR);

    char c;//用于处理方向键控制和wasd键的冲突
    while (1)
    {
        if (_kbhit())
        {
            c = _getch();
            if (c == 'a' || c == 'd' || c == 'w' || c == 's') { ch = c; }
            else {
                ch = _getch();
                if (ch == 75) { ch = 'a'; }
                if (ch == 77) { ch = 'd'; }
                if (ch == 72) { ch = 'w'; }
                if (ch == 80) { ch = 's'; }
            }
        }
        //存储蛇尾以及待添加的位置的值
        snakeTail.snakeX = snake[snakeLen - 1].snakeX;
        snakeTail.snakeY = snake[snakeLen - 1].snakeY;

        switch (ch)
        {
        case 'a'://左
            snakeHeadTemp.snakeX = snake->snakeX - 20;
            snakeHeadTemp.snakeY = snake->snakeY;
            break;
        case 'd'://右
            snakeHeadTemp.snakeX = snake->snakeX + 20;
            snakeHeadTemp.snakeY = snake->snakeY;
            break;
        case 'w'://上
            snakeHeadTemp.snakeY = snake->snakeY - 20;
            snakeHeadTemp.snakeX = snake->snakeX;
            break;
        case 's'://下
            snakeHeadTemp.snakeY = snake->snakeY + 20;
            snakeHeadTemp.snakeX = snake->snakeX;
            break;
        default:
            break;
        }
        //如果撞墙了
        if (snakeHeadTemp.snakeX > 769 || snakeHeadTemp.snakeX < 19 || snakeHeadTemp.snakeY < 19 || snakeHeadTemp.snakeY > 569)
        {
            drawBorder(false, borderWidth);
            setfillcolor(LIGHTGRAY);
            bar(0, getmaxy() / 2 - 30, getmaxx(), getmaxy() / 2 + 40);//提示框
            setbkcolor(LIGHTGRAY);
            _stprintf_s(str, _T("你撞墙啦！总共吃了%d个食物，5秒后自动重新开始游戏，渣渣⋯⋯"), foodCount);
            outtextxy(getmaxx() / 2 - 210, getmaxy() / 2, str);
            Sleep(5000);
            ch='d';
            hard = 1;
            foodCount = 0;
            goto restart;
        }
        if (checkSnake(snake, snakeHeadTemp, snakeLenPtr))
        {
            drawSnake(snakeHeadTemp, snakeR);
            sortSnake(snake, snakeHeadTemp, snakeLenPtr);//更新蛇身体内的数据
            //如果为真，说明吃到了食物，则需要重新分配一个食物。并且要把snakeTail推入数组
            if (eraseSnake(snakeHeadTemp, snakeTail, snakeR, snakeFood))
            {
                foodCount++;
                snake[snakeLen].snakeX = snakeTail.snakeX;
                snake[snakeLen].snakeY = snakeTail.snakeY;
                snakeLen++;
                eraseTail(snakeTail, snakeR);
                sortSnake(snake, snakeHeadTemp, snakeLenPtr);//更新蛇身体内的数据
                                                             //随机产生一个食物
                snakeI = rand() % 38 + 1;
                snakeJ = rand() % 28 + 1;
                snakeFood.snakeX = borderWidth - 11 + 20 * snakeI;
                snakeFood.snakeY = borderWidth - 11 + 20 * snakeJ;
            }
            //每一步都刷新一下食物，因为有时会生成在蛇的身体上，如果不刷新就会被蛇的身体遮挡掉
            setfillcolor(LIGHTRED);
            solidcircle(snakeFood.snakeX, snakeFood.snakeY, snakeR);
        }
        else
        {
            drawBorder(false, borderWidth);
            setfillcolor(LIGHTGRAY);
            bar(0, getmaxy() / 2 - 30, getmaxx(), getmaxy() / 2 + 40);//提示框
            setbkcolor(LIGHTGRAY);
            _stprintf_s(str, _T("居然会有人撞到自己！噗笑尿！总共吃了%d个食物，5秒后自动重新开始游戏，渣渣⋯⋯"), foodCount);
            outtextxy(getmaxx() / 2 - 310, getmaxy() / 2, str);
            Sleep(5000);
            ch = 'd';
            hard = 1;
            foodCount = 0;
            goto restart;
        }
        Sleep(speed);
    }
    closegraph();
    return 0;
}