阅读学习了源代码，并做了简单的注释和修改，里面只用了链表数据结构，非常适合C语言入门者学习阅读。

程序可在VS2013下编译运行。

#include<stdio.h>#include<time.h>#include<windows.h>#include<stdlib.h>#define U 1#define D 2#define L 3 #define R 4 //蛇的状态，U：上 ；D：下；L:左 R：右typedef struct SNAKE //蛇身的一个节点{ int x; int y; struct SNAKE *next;}snake;//全局变量//int score = 0, add = 10;//总得分与每次吃食物得分。int status, sleeptime = 200;//每次运行的时间间隔snake *head, *food;//蛇头指针，食物指针snake *q;//遍历蛇的时候用到的指针int endGamestatus = 0; //游戏结束的情况，1：撞到墙；2：咬到自己；3：主动退出游戏。//声明全部函数//void Pos();void creatMap();void initSnake();int biteSelf();void createFood();void cantCrossWall();void snakeMove();void pause();void runGame();void initGame();void endGame();void gameStart();void Pos(int x, int y)//设置光标位置{ COORD pos; HANDLE hOutput; pos.X = x; pos.Y = y; hOutput = GetStdHandle(STD_OUTPUT_HANDLE);//返回标准的输入、输出或错误的设备的句柄，也就是获得输入、输出/错误的屏幕缓冲区的句柄 SetConsoleCursorPosition(hOutput, pos);}void creatMap()//创建地图{ int i; for (i = 0; i<58; i += 2)//打印上下边框 { Pos(i, 0); printf("■");//一个方块占两个位置 Pos(i, 26); printf("■"); } for (i = 1; i<26; i++)//打印左右边框 { Pos(0, i); printf("■"); Pos(56, i); printf("■"); }}void initSnake()//初始化蛇身{ snake *tail; int i; tail = (snake*)malloc(sizeof(snake));//从蛇尾开始，头插法，以x,y设定开始的位置// tail->x = 24; tail->y = 5; tail->next = NULL; for (i = 1; i <= 4; i++)//初始长度为4 { head = (snake*)malloc(sizeof(snake)); head->next = tail; head->x = 24 + 2 * i; head->y = 5; tail = head; } while (tail != NULL)//从头到为，输出蛇身 { Pos(tail->x, tail->y); printf("■"); tail = tail->next; }}//??int biteSelf()//判断是否咬到了自己{ snake *self; self = head->next; while (self != NULL) { if (self->x == head->x && self->y == head->y) { return 1; } self = self->next; } return 0;}void createFood()//随机出现食物{ snake *food_1; srand((unsigned)time(NULL));//为了防止每次产生的随机数相同，种子设置为time food_1 = (snake*)malloc(sizeof(snake)); while ((food_1->x % 2) != 0) //保证其为偶数，使得食物能与蛇头对其 { food_1->x = rand() % 52 + 2; } food_1->y = rand() % 24 + 1; q = head; while (q->next == NULL) { if (q->x == food_1->x && q->y == food_1->y) //判断蛇身是否与食物重合 { free(food_1); createFood(); } q = q->next; } Pos(food_1->x, food_1->y); food = food_1; printf("■");}void cantCrossWall()//不能穿墙{ if (head->x == 0 || head->x == 56 || head->y == 0 || head->y == 26) { endGamestatus = 1; endGame(); }}void snakeMove()//蛇前进,上U,下D,左L,右R{ snake * nexthead; cantCrossWall(); nexthead = (snake*)malloc(sizeof(snake)); if (status == U) { nexthead->x = head->x; nexthead->y = head->y - 1; if (nexthead->x == food->x && nexthead->y == food->y)//如果下一个有食物// { nexthead->next = head; head = nexthead; q = head; while (q != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } score = score + add; createFood(); } else //如果没有食物// { nexthead->next = head; head = nexthead; q = head; while (q->next->next != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } Pos(q->next->x, q->next->y); printf(" "); free(q->next); q->next = NULL; } } if (status == D) { nexthead->x = head->x; nexthead->y = head->y + 1; if (nexthead->x == food->x && nexthead->y == food->y) //有食物 { nexthead->next = head; head = nexthead; q = head; while (q != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } score = score + add; createFood(); } else //没有食物 { nexthead->next = head; head = nexthead; q = head; while (q->next->next != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } Pos(q->next->x, q->next->y); printf(" "); free(q->next); q->next = NULL; } } if (status == L) { nexthead->x = head->x - 2; nexthead->y = head->y; if (nexthead->x == food->x && nexthead->y == food->y)//有食物 { nexthead->next = head; head = nexthead; q = head; while (q != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } score = score + add; createFood(); } else //没有食物 { nexthead->next = head; head = nexthead; q = head; while (q->next->next != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } Pos(q->next->x, q->next->y); printf(" "); free(q->next); q->next = NULL; } } if (status == R) { nexthead->x = head->x + 2; nexthead->y = head->y; if (nexthead->x == food->x && nexthead->y == food->y)//有食物 { nexthead->next = head; head = nexthead; q = head; while (q != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } score = score + add; createFood(); } else //没有食物 { nexthead->next = head; head = nexthead; q = head; while (q->next->next != NULL) { Pos(q->x, q->y); printf("■"); q = q->next; } Pos(q->next->x, q->next->y); printf(" "); free(q->next); q->next = NULL; } } if (biteSelf() == 1) //判断是否会咬到自己 { endGamestatus = 2; endGame(); }}void pause()//暂停{ while (1) { Sleep(300); if (GetAsyncKeyState(VK_SPACE)) { break; } }}void runGame()//控制游戏 { Pos(64, 15); printf("不能穿墙，不能咬到自己\n"); Pos(64, 16); printf("用↑.↓.←.→分别控制蛇的移动."); Pos(64, 17); printf("F1 为加速，F2 为减速\n"); Pos(64, 18); printf("ESC ：退出游戏.space：暂停游戏."); Pos(64, 20); printf("C语言研究中心 www.clang.cc"); status = R; while (1) { Pos(64, 10); printf("得分：%d ", score); Pos(64, 11); printf("每个食物得分：%d分", add); if (GetAsyncKeyState(VK_UP) && status != D) { status = U; } else if (GetAsyncKeyState(VK_DOWN) && status != U) { status = D; } else if (GetAsyncKeyState(VK_LEFT) && status != R) { status = L; } else if (GetAsyncKeyState(VK_RIGHT) && status != L) { status = R; } else if (GetAsyncKeyState(VK_SPACE)) { pause(); } else if (GetAsyncKeyState(VK_ESCAPE)) { endGamestatus = 3; break; } else if (GetAsyncKeyState(VK_F1)) { if (sleeptime >= 50) { sleeptime = sleeptime - 30; add = add + 2; if (sleeptime == 320) { add = 2;//防止减到1之后再加回来有错 } } } else if (GetAsyncKeyState(VK_F2)) { if (sleeptime<350) { sleeptime = sleeptime + 30; add = add - 2; if (sleeptime == 350) { add = 1; //保证最低分为1 } } } Sleep(sleeptime); snakeMove(); }}void initGame()//开始界面{ Pos(40, 12); system("title C语言研究中心 www.clang.cc"); printf("欢迎来到贪食蛇游戏！"); Pos(40, 25); printf(" C语言研究中心 www.clang.cc.\n"); system("pause"); system("cls"); Pos(25, 12); printf("用↑.↓.←.→分别控制蛇的移动， F1 为加速，2 为减速\n"); Pos(25, 13); printf("加速将能得到更高的分数。\n"); system("pause"); system("cls");}void endGame()//结束游戏{ system("cls"); Pos(24, 12); if (endGamestatus == 1) { printf("对不起，您撞到墙了。游戏结束."); } else if (endGamestatus == 2) { printf("对不起，您咬到自己了。游戏结束."); } else if (endGamestatus == 3) { printf("您的已经结束了游戏。"); } Pos(24, 13); printf("您的得分是%d\n", score); while (getchar() != 'y') { printf("close?[y]"); } exit(0);}void gameStart()//游戏初始化{ system("mode con cols=100 lines=30"); initGame(); creatMap(); initSnake(); createFood();}int main(){ gameStart(); runGame(); endGame(); return 0;}

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