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#include<iostream>

#include<windows.h>

#include<conio.h>

#include<deque>

#include<ctime>

#include<stdexcept>

using namespace std;

struct Snake { //蛇類結(jié)構(gòu)體

? ? char image;

? ? short x, y; //坐標(biāo)

};

class snakeGame {

public:

snakeGame();

void printMap();

void gotoxy(short x, short y) {

hOut = GetStdHandle(STD_OUTPUT_HANDLE); //獲取句柄

pos = {x, y};

SetConsoleCursorPosition(hOut, pos); //移動光標(biāo)

}

void HideCursor() //隱藏光標(biāo)

{

HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);

CONSOLE_CURSOR_INFO CursorInfo;

GetConsoleCursorInfo(handle, &CursorInfo);//獲取控制臺光標(biāo)信息

CursorInfo.bVisible = false; //隱藏控制臺光標(biāo)

SetConsoleCursorInfo(handle, &CursorInfo);//設(shè)置控制臺光標(biāo)狀態(tài)

}

void initSnake() { //初始化蛇，可以自行改變

snake.push_front({'@', width / 2, height / 2});

for (int i=0; i<2;++i)

snake.push_back({'+', width/2,static_cast<short>(height/2+i+1)});

}

int WrongLocation() { //判斷是否食物產(chǎn)生位置與蛇身沖突

for (Snake body : snake)

if(body.x == food_x && body.y == food_y) return 0;

return 1;

}

void createFood() {

do {

food_x = rand() % (width - 4) + 2;

food_y = rand() % (height - 2) + 1;

} while (!WrongLocation());//處理沖突

gotoxy(food_x,food_y); cout << '*' << endl; //打印食物

}

void printSnake();

inline void clearSnake(Snake &tail) {

? ? gotoxy(tail.x, tail.y); cout << ' '; //覆蓋蛇尾，不使用清屏函數(shù)，避免了閃爍

}

void judgeCrash();

void foodEaten();

void userInput() {

switch(char ch; ch=getch()) {

case 'w':if (dir != 's') dir = ch;break;

case 'a':if (dir != 'd') dir = ch;break;

case 's':if (dir != 'w') dir = ch;break;

case 'd':if (dir != 'a') dir = ch;break;

case 'v':speed*=0.8;break; case 'b':speed*=1.5;break;

case ' ':gotoxy(width / 2, height); cout << "游戲已暫停，任意鍵繼續(xù)"; getch();

? ? ? ? ? ? gotoxy(width / 2, height); cout << "? ? ? ? ? ? ? ? ? ? ?"; break;

default:break;

}

}

private:

enum MapSize {height = 40,width = 120}; //地圖尺寸

HANDLE hOut; COORD pos;

char dir; //direction

bool beg,eatFood=false;

double speed=200;

deque<Snake> snake;

int food_x,food_y;

int score=0;

};

void snakeGame::foodEaten() {

createFood();

eatFood=true;

speed*=.8;

++score;

}

void snakeGame::judgeCrash() {

int flag=0;

if (snake.size()>=5) {

deque<Snake>::iterator iter = snake.begin() + 1;

int x = (iter-1)->x, y = (iter-1)->y;

for (; iter != snake.end(); ++iter) {

if (iter->x == x && iter->y == y) flag=1;

}}

if (flag || snake.front().x == 1 || snake.front().x == width - 2 || snake.front().y == 0 || snake.front().y == height - 1)//檢測是否撞墻或者是否吃到自身

? ? {

? ? ? ? gotoxy(width / 2 - 10, height /2);

? ? ? ? cout << "游戲結(jié)束！您的分?jǐn)?shù)是: " << score << "分（回車?yán)^續(xù)）"<<endl;

? ? ? ? while(1) {

? ? ? ? ? ? dir = getch();

? ? ? ? ? ? if (dir == '\r') break;}

runtime_error quit("游戲結(jié)束，正常退出"); throw quit;

? ? }

}

void snakeGame::printSnake() {

? ? deque<Snake>::const_iterator iter = snake.begin();

? ? for (; iter <= snake.begin() + 1 && iter < snake.end(); ++iter) {

? ? ? ? gotoxy(iter->x, iter->y); cout << iter->image;

? ? }

}

void snakeGame::printMap() {

int i;

? ? for (i = 0; i != width; i += 2) cout << "■"; //這個圖案寬度占2，高度占1

? ? gotoxy(0, 1);

? ? for (i = 1; i != height; ++i) cout << "■" << endl;

? ? for (i = 1; i != height; ++i) {

? ? ? ? gotoxy(width - 2, i); cout << "■";}

? ? gotoxy(0, height - 1);

? ? for (i = 0; i != width; i += 2) cout << "■";

? ? cout << "貪吃蛇：1.方向鍵開始游戲 2.*代表食物 3.空格鍵暫停游戲\n? ? ? ? 4.鍵入'v'加速? ? 5.鍵入'b'減速";

}

snakeGame::snakeGame() {

HideCursor(); srand(static_cast<unsigned int>(time(NULL)));

beg=true;

Snake tmp1,tmp2;

while (1) {

if(beg) {

printMap();

dir = getch();

initSnake();

createFood();

beg = eatFood=false;}

tmp2=snake.back(); tmp1=snake.front();

snake.pop_back();

if (eatFood) {tmp2.image='+'; snake.push_back(tmp2);

eatFood=false;}

else clearSnake(tmp2);

if? ? ? (dir == 's') ++tmp1.y;

? ? ? ? else if (dir == 'a') --tmp1.x;

? ? ? ? else if (dir == 'd') ++tmp1.x;

? ? ? ? else --tmp1.y;

try{judgeCrash();}

catch(runtime_error &quitSignal) {

throw quitSignal;

}

snake.front().image='+'; snake.push_front(tmp1);

printSnake();

Sleep(speed+30);

if (tmp1.x == food_x && tmp1.y == food_y)?

foodEaten();

if(kbhit()) userInput();

}

}

int main() {

system("mode con cols=120 lines=42");

try{

snakeGame game;

}

catch(runtime_error &gameEnd) {

system("cls");

cout<<gameEnd.what();

getch();

}

}?