#include "Snake.h"
pSnake head = NULL; //定义蛇头指针
pSnake Food = NULL; //定义食物指针
int sleeptime = 500; //间隔时间，用来控制速度
int Score = 0; //总分
int everyScore = 1; //每步得分
//定义游戏中用到的符号
const char food = '#';
const char snake = '*';
void Pos(int x, int y) //控制输出光标
{
COORD pos; //pos为结构体
pos.X = x; //控制列
pos.Y = y; //控制行
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), pos); //读取标准输出句柄来控制光标为pos
}
void Face()
{
system("color 0C");
printf("*******************************************************n");
printf("* Welcome to Snake Game! *n");
printf("* *n");
printf("* ->开始游戏请按 enter键 *n");
printf("* ->退出游戏请按 esc键 *n");
printf("* ->暂停游戏请按 space键 *n");
printf("* ->通过上下左右键来控制蛇的移动 *n");
printf("* ->通过F1键减速 F2键加速 *n");
printf("*******************************************************n");
}
void Map() //初始化地图
{
int i = 0;
for (i = 0; i < COL_MAP; i += 2) //打印上下边框（每个■占用两列）
{
Pos(i, 0);
printf("■");
Pos(i, ROW_MAP - 1);
printf("■");
}
for (i = 0; i < ROW_MAP; i++) //打印左右边框
{
Pos(0, i);
printf("■");
Pos(COL_MAP - 2, i);
printf("■");
}
}
void PrintSnake() //打印蛇
{
pSnake cur = head;
while (cur)
{
Pos(cur->y, cur->x);
printf("%c", snake);
cur = cur->next;
}
}
void InitSnake() //初始化蛇身
{
int initNum = 3;
int i = 0;
pSnake cur;
head = (pSnake)malloc(sizeof(Snake));
head->x = 5;
head->y = 10;
head->next = NULL;
cur = head;
for (i = 1; i < initNum; i++)
{
pSnake newNode = (pSnake)malloc(sizeof(Snake));
newNode->x = 5 + i;
newNode->y = 10;
newNode->next = NULL;
cur->next = newNode;
cur = cur->next;
}
PrintSnake();
}
void CreateFood() //在地图上随机产生一个食物
{
pSnake cur = head;
Food = (pSnake)malloc(sizeof(Snake));
//产生x~y的随机数 k=rand()%(Y-X+1)+X;
srand((unsigned)time(NULL));
Food->x = rand() % (ROW_MAP - 2 - 1 + 1) + 1;
Food->y = rand() % (COL_MAP - 3 - 2 + 1) + 2;
Food->next = NULL;
while (cur) //检查食物是否与蛇身重合
{
if (cur->x == Food->x && cur->y == Food->y)
{
free(Food);
Food = NULL;
CreateFood();
return;
}
cur = cur->next;
}
Pos(Food->y, Food->x);
printf("%c", food);
}
void StartGame() //游戏开始的所有设置
{
Face();
system("pause");
if (GetAsyncKeyState(VK_RETURN))
{
system("cls");
Pos(COL_MAP + 5, 1);
printf("当前分数/通关分数:");
Pos(COL_MAP + 20, 1);
printf("%d/%d", Score, SUCCESS_SCORE);
Pos(COL_MAP + 5, 2);
printf("当前分每步得分:");
Pos(COL_MAP + 20, 2);
printf("%d", everyScore);
Pos(COL_MAP + 5, 3);
printf("n");
Pos(COL_MAP + 5, 4);
printf("速度越快 得分越高哦！！n");
Map();
InitSnake();
CreateFood();
}
else if (GetAsyncKeyState(VK_ESCAPE))
{
exit(0);
}
}
int IsCrossWall() //判断是否碰到墙
{
if (head->x <= 0 || head->x >= ROW_MAP - 1 || head->y <= 1 || head->y >= COL_MAP - 2)
{
State = ERROR_WALL;
return 0;
}
return 1;
}
int IsEatSelf(pSnake newHead) //判断是否咬到自己
{
pSnake cur = head;
assert(newHead);
while (cur)
{
if (cur->x == newHead->x && cur->y == newHead->y)
{
State = ERROR_SELF;
return 0;
}
cur = cur->next;
}
return 1;
}
int IsFood(pSnake pos) //判断该位置是不是食物
{
assert(pos);
if (pos->x == Food->x && pos->y == Food->y)
{
return 1;
}
return 0;
}
void SnakeMove() //蛇移动一次
{
pSnake newHead = NULL;
newHead = (pSnake)malloc(sizeof(Snake));
if (Direction == R)
{
newHead->x = head->x;
newHead->y = head->y + 1;
newHead->next = head;
}
else if (Direction == L)
{
newHead->x = head->x;
newHead->y = head->y - 1;
newHead->next = head;
}
else if (Direction == U)
{
newHead->x = head->x - 1;
newHead->y = head->y;
newHead->next = head;
}
else if (Direction == D)
{
newHead->x = head->x + 1;
newHead->y = head->y;
newHead->next = head;
}
if (IsFood(newHead))
{
head = newHead;
PrintSnake();
CreateFood();
Score += everyScore;
Pos(COL_MAP + 20, 1);
printf("%d/%d", Score, SUCCESS_SCORE);
if (Score >= SUCCESS_SCORE)
{
State = SUCCESS;
}
}
else
{
if (IsCrossWall() && IsEatSelf(newHead))
{
pSnake cur = NULL;
head = newHead;
cur = head;
//删除蛇尾并打印
while (cur->next->next != NULL)
{
Pos(cur->y, cur->x);
printf("%c", snake);
cur = cur->next;
}
Pos(cur->y, cur->x);
printf("%c", snake);
Pos(cur->next->y, cur->next->x);
printf(" "); //打印空格来覆盖频幕上的蛇尾
free(cur->next);
cur->next = NULL;
}
else
{
free(newHead);
newHead = NULL;
}
}
}
void Pause()
{
while (1)
{
Sleep(sleeptime);
if (GetAsyncKeyState(VK_SPACE))
{
break;
}
}
}
void ControlSnake() //用键盘控制游戏
{
if (GetAsyncKeyState(VK_UP) && Direction != D)
{
Direction = U;
}
else if (GetAsyncKeyState(VK_DOWN) && Direction != U)
{
Direction = D;
}
else if (GetAsyncKeyState(VK_LEFT) && Direction != R)
{
Direction = L;
}
else if (GetAsyncKeyState(VK_RIGHT) && Direction != L)
{
Direction = R;
}
else if (GetAsyncKeyState(VK_F1))
{
if (sleeptime != 500)
{
sleeptime = 500;
everyScore = 1;
Pos(COL_MAP + 20, 2);
printf("%d", everyScore);
}
}
else if (GetAsyncKeyState(VK_F2))
{
if (sleeptime != 300)
{
sleeptime = 300;
everyScore = 2;
Pos(COL_MAP + 20, 2);
printf("%d", everyScore);
}
}
else if (GetAsyncKeyState(VK_SPACE))
{
Pause();
}
else if (GetAsyncKeyState(VK_ESCAPE))
{
exit(0);
}
}
void StateGame() //判断游戏失败或成功
{
if (State == ERROR_SELF)
{
system("cls");
printf("很遗憾，蛇咬到自己，游戏失败！n");
}
else if (State == ERROR_WALL)
{
system("cls");
printf("很遗憾，蛇碰到墙壁，游戏失败！n");
}
else if (State == SUCCESS)
{
system("cls");
printf("恭喜您，已通关！！！n");
}
}
void RunGame()
{
Direction = R; //蛇初始行走方向为右
State = NORMAL; //游戏初始为正常状态
while (1)
{
ControlSnake();
SnakeMove();
if (State != NORMAL)
{
StateGame();
break;
}
Sleep(sleeptime);
}
}
void EndGame() //释放链表并恢复默认值
{
pSnake cur = head;
while (cur)
{
pSnake del = cur;
cur = cur->next;
free(del);
del = NULL;
}
head = NULL;
if (Food != NULL)
{
free(Food);
Food = NULL;
}
Score = 0;
everyScore = 1;
sleeptime = 500;
}
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