贪吃蛇小游戏

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <Windows.h>
#ifndef _SNAKE_H_H_H
#define _SNAKE_H_H_H


//调节游戏界面大小，这里设置为15*15
int const COL = 15;
int const ROW = 15;


//蛇节点
typedef struct Node
{
int x;
int y;
struct Node *pre;
struct Node *next;
}NODE, *pNODE;


//食物
typedef struct Food
{
int x;
int y;
char c;
}FOOD, *pFOOD;


//初始化，创建蛇的第一节
pNODE InitSnake(void);


//初始化食物成员
FOOD InitFood(void);


//蛇运动函数
int MoveSnake(pNODE pHead, char c);


//检查键盘按键
char KbHit(char orient);


//蛇吃到食物处理函数
pNODE SnakeEatFood(pNODE pHead, pFOOD pFood);


//打印游戏界面函数
void Print(pNODE pHead, FOOD food);


//游戏结束，释放内存函数
void FreeMemory(pNODE *ppHead);


#endif




//主函数
int main(void)
{
char orien = 'a', get_char;
int game_over = 0;


FOOD food = InitFood();
pNODE head = InitSnake();


while (1)
{
head = SnakeEatFood(head, &food);
get_char = KbHit(orien);
if (27 == get_char)
{
game_over = 1;
break;
}
else
orien = get_char;
game_over = MoveSnake(head, orien);
if (game_over)
break;

system("cls");
Print(head, food);
Sleep(200); //ms级，刷屏间隔时间
}
if (game_over)
{
printf("游戏结束！\n");


FreeMemory(&head);
if (NULL == head)
printf("内存释放成功！\n");
else
printf("内存释放失败！\n");
}
getch();
return 0;
}
//初始化，创建蛇的第一节
pNODE InitSnake(void)
{
pNODE pHead = (pNODE)malloc(sizeof(NODE));
srand((unsigned)(time(NULL)+1));


if (NULL == pHead)
{
printf("内存分配失败！\n");
exit(-1);
}

pHead->x = rand() % ROW;
pHead->y = rand() % COL;
pHead->next = NULL;
pHead->pre = NULL;


return pHead;
}
//初始化食物成员
FOOD InitFood(void)
{
FOOD food;
srand((unsigned)time(NULL));


food.x = rand() % ROW;
food.y = rand() % COL;
food.c = 65 + rand()%26;


return food;
}
//蛇吃到食物处理函数
pNODE SnakeEatFood(pNODE pHead, pFOOD pFood)
{
pNODE p_add = NULL, pt = NULL, rear = NULL;

if (pFood->x == pHead->x && pFood->y == pHead->y)
{
p_add = (pNODE)malloc(sizeof(NODE));
if (NULL == p_add)
{
printf("内存分配失败！\n");
exit(-1);
}


pt = pHead;
while (pt->next != NULL)
{
pt = pt->next;
}
p_add->pre = pt;
p_add->next = NULL;
pt->next = p_add;


*pFood = InitFood();
//不让食物出现在蛇的位置上
pt = pHead;
while (pt != NULL)
{
if (pFood->x == pHead->x && pFood->y == pHead->y)
{
*pFood = InitFood();
break;
}
pt = pt->next;
}
}


return pHead;
}
//检查键盘按键
char KbHit(char orient)
{
char c;


if (kbhit())
{
c = getch();
if (orient != 'd' && c == 'a')
{
orient = c;
}
else if (orient != 'a' && c == 'd')
{
orient = c;
}
else if (orient != 'w' && c == 's')
{
orient = c;
}
else if (orient != 's' && c == 'w')
{
orient = c;
}
else if (27 == c)
{
orient = c;
}
}


return orient;
}
//蛇运动函数
int MoveSnake(pNODE pHead, char c)
{
INT game_over = 0;
pNODE pt = pHead;


//让pt指向蛇尾
while (pt->next != NULL)
{
pt = pt->next;
}


//从蛇尾向向蛇头前进
while(pt != pHead)
{
pt->x = pt->pre->x;
pt->y = pt->pre->y;
pt = pt->pre;
}


if ('d' == c)
{
pHead->x += 1;
if (pHead->x >= ROW)
{
pHead->x -= ROW;
}
}


if ('a' == c)
{
pHead->x -= 1;
if (pHead->x < 0)
{
pHead->x += ROW;
}
}

if ('s' == c)
{
pHead->y += 1;
if (pHead->y >= COL)
{
pHead->y -= COL;
}
}


if ('w' == c)
{
pHead->y -= 1;
if (pHead->y < 0)
{
pHead->y += COL;
}
}


//当蛇头碰到蛇身，游戏结束
pt = pHead->next;
while (pt != NULL)
{
if (pt->x == pHead->x && pt->y == pHead->y)
{
game_over = 1;
}
pt = pt->next;
}


return game_over;
}
//打印游戏界面函数
void Print(pNODE pHead, FOOD food)
{
int row = 0, col = 0, flag = 0;
pNODE pt = NULL;


printf("     航空工程学院\n");
        printf("   \n");
        printf("方向控制——上:w 下:s 左:a 右:d(Esc退出)\n ");
for (row=0; row<ROW; row++)
{
printf("—");
}
putchar('\n');


for (col=0; col<COL; col++)
{
printf(" |");
for (row=0; row<ROW; row++)
{
pt = pHead;
flag = 0;
//打印出蛇
while (pt != NULL)
{
if (row == pt->x && col == pt->y)
{
if (pt == pHead)
printf("安");
else if (pt==pHead->next)
printf("阳");
else if(pt==pHead->next->next)
printf("学");
else if(pt==pHead->next->next->next)
   printf("院");
else if(pt==pHead->next->next->next->next)
printf("航");
else if(pt==pHead->next->next->next->next->next)
printf("空");
else if(pt==pHead->next->next->next->next->next->next)
printf("工");
else if(pt==pHead->next->next->next->next->next->next->next)
printf("程");
else if(pt==pHead->next->next->next->next->next->next->next->next)
                        printf("学");
else if(pt==pHead->next->next->next->next->next->next->next->next->next)
                        printf("院");
else
printf("院");
flag = 1;
break;
}
pt = pt->next;
}
//打印出食物或两个空格
if (0 == flag)
{
if (row == food.x && col == food.y)
{
putchar(food.c);
putchar(food.c);
continue;
}
printf("  ");
}
}
printf("|");
putchar('\n');
}

printf("  ");
for (row=0; row<ROW; row++)
{
printf("—");
}
putchar('\n');
}
//释放内存函数
void FreeMemory(pNODE *ppHead)
{
pNODE p_delete = NULL, pt = NULL;


while (*ppHead != NULL)
{
pt = (*ppHead)->next;
if (pt != NULL)
{
pt->pre = NULL;
}
p_delete = *ppHead;
free(p_delete);
p_delete = NULL;
*ppHead = pt;
}
}