纯C++贪吃蛇低配版小游戏(VS2017)

版权声明：转载请注明出处 https://blog.csdn.net/qq_35294564/article/details/82761215

#include <iostream>
#include <conio.h>
#include <Windows.h>
#include <iomanip>
#include <cmath>
#include <vector>
using namespace std;

//定义全局变量
int length = 4;
int speed = 1;
int map[20][20];
int appleX, appleY;//定义苹果坐标为全局变量
int headX, headY;//蛇头坐标
int score = 0;

char op = 'o';//获取操作指令
bool isEated = false;//是否吃到了？
bool GameOver = false;//游戏结束否？
bool crashed = false;//是否撞墙或者撞到自己

//函数声明
void init();//界面初始化
void refresh();//刷新界面
void goUp();//向上
void goDown();//向下
void goLeft();//向左
void goRight();//向右
void createApple();//随机产生苹果
void autoRun();//最后，会自己跑路了
void printPic();//打印

//定义类
class Point {
	int xvar;
	int yvar;
public:
	Point() {};
	~Point() {};
	Point(int x, int y) :xvar(x), yvar(y) {}
	int x()const { return xvar; };
	int y()const { return yvar; };
};

enum class Direction{up,down,left,right};
Direction dire = Direction::right;//默认朝右走

class Snake {//蛇类
	int length = length;
	int speed = speed;
public:
	Snake() {};
	~Snake() {};
	int len()const { return length; };
	int sp()const { return speed; };
	vector<Point> snakeBody{ Point(3,3),Point(3,4),Point(3,5),Point(3,6) };//蛇身
	Direction direct = Direction::right;//蛇头方向
};


Snake *s = new Snake;//定义为全局蛇，方便操作
//主函数
int main() {
	init();
	refresh();
	goRight();
	system("pause");
	return 0;
}
//函数实体
void init() {
	for (int i = 0; i < 20; i++)
		for (int j = 0; j < 20; j++)
			if (i == 0 || i == 19 || j == 0 || j == 19)
				map[i][j] = 1;
			else
				map[i][j] = 0;
	createApple();//随机产生苹果位置
}
void refresh() {
	if(isEated)
		createApple();//随机产生苹果位置
	for (vector<Point>::iterator it = s->snakeBody.begin(); it != s->snakeBody.end(); it++) {
		map[(*it).x()][(*it).y()] = 1;
		headX = (*(s->snakeBody.end() - 1)).x();
		headY = (*(s->snakeBody.end() - 1)).y();//实时蛇头坐标
		if (headX == appleX && headY == appleY)//吃到了！
			isEated = true;
	}
	//printPic();
	autoRun();
}
void printPic() {
	system("cls");
	cout << endl << "-----------------贪吃蛇-----------------" << endl;
	cout << endl << "                 分数:"<<score<< endl << endl;
	for (int i = 0; i < 20; i++) {
		for (int j = 0; j < 20; j++) {
			if (map[i][j] == 1) {
				cout << "■";
			}
			else
				cout << setw(2) << "";
		}
		cout << endl;
	}
	cout << "蛇头位置：（" <<headX << "，" << headY << "）" << endl;
	cout << "蛇长：" << s->snakeBody.size() << endl;
	cout << "请输入W、S、A、D控制方向：";
}
void createApple() {//随机产生苹果位置
	while (true) {
		srand((int)time(NULL));
		int row = rand() % 18 + 1;//产生1~18的随机数
		int col = rand() % 18 + 1;
		if (map[row][col] == 0) {
			map[row][col] = 1;
			appleX = row;
			appleY = col;
			break;
		}
	}
	if (isEated)
		score += 10;
	isEated = false;//刚产生的苹果吃不到！
}

void goUp() {    //四种情况①撞墙；②撞苹果；③撞自己；④都不撞
	dire = Direction::up;
	if (map[headX - 1][headY] == 0) {//都不撞（头插一点，尾删一点）
		s->snakeBody.push_back(Point(headX - 1, headY));//头插一点
		map[headX - 1][headY] = 1;
		vector<Point>::iterator it = s->snakeBody.begin();//找到第一个点（尾部）
		map[(*it).x()][(*it).y()] = 0;
		s->snakeBody.erase(it);//尾删一点
	}
	else if ((headX - 1 == appleX) && (headY == appleY)) {//撞苹果，吃到（头插一点，尾不删）
		s->snakeBody.push_back(Point(headX - 1, headY));//头插一点
		map[headX - 1][headY] = 1;
	}
	else if (map[headX - 1][headY] == 1) {//不是撞苹果->撞墙：GameOver
		crashed = true;
		return;
	}
	printPic();
	Sleep(300);
	refresh();
}

void goDown() {    //四种情况①撞墙；②撞苹果；③撞自己；④都不撞
	dire = Direction::down;
	if (map[headX + 1][headY] == 0) {//都不撞（头插一点，尾删一点）
		s->snakeBody.push_back(Point(headX + 1, headY));//头插一点
		map[headX + 1][headY] = 1;
		vector<Point>::iterator it = s->snakeBody.begin();//找到第一个点（尾部）
		map[(*it).x()][(*it).y()] = 0;
		s->snakeBody.erase(it);//尾删一点
	}
	else if ((headX + 1 == appleX) && (headY == appleY)) {//撞苹果，吃到（头插一点，尾不删）
		s->snakeBody.push_back(Point(headX + 1, headY));//头插一点
		map[headX + 1][headY] = 1;
	}
	else if (map[headX + 1][headY] == 1) {//撞墙：GameOver
		crashed = true;
		return;
	}
	printPic();
	Sleep(300);
	refresh();
}
void goLeft() {    //四种情况①撞墙；②撞苹果；③撞自己；④都不撞
	dire = Direction::left;
	if (map[headX][headY - 1] == 0) {//都不撞（头插一点，尾删一点）
		s->snakeBody.push_back(Point(headX, headY - 1));//头插一点
		map[headX][headY - 1] = 1;
		vector<Point>::iterator it = s->snakeBody.begin();//找到第一个点（尾部）
		map[(*it).x()][(*it).y()] = 0;
		s->snakeBody.erase(it);//尾删一点
	}
	else if ((headX == appleX) && (headY - 1 == appleY)) {//撞苹果，吃到（头插一点，尾不删）
		s->snakeBody.push_back(Point(headX, headY - 1));//头插一点
		map[headX][headY - 1] = 1;
	}
	else if (map[headX][headY - 1] == 1) {//撞墙：GameOver
		crashed = true;
		return;
	}
	printPic();
	Sleep(300);
	refresh();
}
void goRight() {    //四种情况①撞墙；②撞苹果；③撞自己；④都不撞
	dire = Direction::right;
	if (map[headX][headY + 1] == 0) {//都不撞（头插一点，尾删一点）
		s->snakeBody.push_back(Point(headX, headY + 1));//头插一点
		map[headX][headY + 1] = 1;
		vector<Point>::iterator it = s->snakeBody.begin();//找到第一个点（尾部）
		map[(*it).x()][(*it).y()] = 0;
		s->snakeBody.erase(it);//尾删一点
	}
	else if ((headX == appleX) && (headY + 1 == appleY)) {//撞苹果，吃到（头插一点，尾不删）
		s->snakeBody.push_back(Point(headX, headY + 1));//头插一点
		map[headX][headY + 1] = 1;
	}
	else if (map[headX][headY + 1] == 1) {//撞墙：GameOver
		crashed = true;
		return;
	}
	printPic();
	Sleep(300);
	refresh();
}

void autoRun() {
	while (!crashed) {
		if (_kbhit()) {//非阻塞监听键盘事件，有键盘事件为真，否则返回零
			op = _getche();
			switch (op)
			{
			case 'w':
			case 'W':
				if (dire == Direction::down)
					break;
				dire = Direction::up; goUp(); break;
			case 's':
			case 'S':
				if (dire == Direction::up)
					break;
				dire = Direction::down; goDown(); break;
			case 'a':
			case 'A':
				if (dire == Direction::right)
					break;
				dire = Direction::left; goLeft(); break;
			case 'd':
			case 'D':
				if (dire == Direction::left)
					break;
				dire = Direction::right; goRight(); break;
			default:
				break;
			}
		}
		else {
			if (dire == Direction::up) {
				goUp();
			}
			else if (dire == Direction::down) {
				goDown();
			}
			else if (dire == Direction::left) {
				goLeft();
			}
			else {
				goRight();
			}
		}
	}
	if (crashed) {
		MessageBox(0, TEXT("不要灰心！下次努力！"), TEXT("Sorry，defeat!!"), 0);
		delete(s);
		exit(0);
	}
}

运行效果：