C++貪吃蛇程序

方向控制表

dir	direct[dir]	行進方向	可轉的方向
0	{-1,0}	上	左右
1	{1,0}	下	左右
2	{0,-1}	左	上下
3	{0,1}	右	上下

#include <iostream>  
#include <cstdio>  
#include <cstdlib>  
#include <ctime>  
#include <conio.h>  
#include <cmath>  
#include <windows.h>  
using namespace std;
int s = 12, d = 12, Hard = 3 ,Dir; 
int Snake_len = 5;
int Direct[4][2] = { { -1, 0 }, { 1, 0 }, { 0, -1 }, { 0, 1 } };
struct point
{
	int x,y;
} Snake[300];
point food;

/*** 光標定位 ***/
HANDLE Hout = GetStdHandle(STD_OUTPUT_HANDLE);
COORD Coord;

/*** 實現光標的位置控制 ***/
void Locate(int x, int y)
{
	Coord.X = y;
	Coord.Y = x;
	SetConsoleCursorPosition(Hout, Coord); //
};

/*** 隱藏光標 ***/
void Hide()
{
	CONSOLE_CURSOR_INFO cursor_info = { 1, 0 };
	SetConsoleCursorInfo(Hout, &cursor_info);
}

void get_snake(){
	int i = 0;
	while (i<Snake_len)
	{
		Snake[i].x = 2;
		Snake[i].y = Snake_len-i;
		i++;
	}
	Locate(Snake[0].x, Snake[0].y); cout << "@";
	for (int i = 1; i < Snake_len; i++)
	{
		Locate(Snake[i].x, Snake[i].y); 
		cout << "*";
	}
}
int random(int S, int E){
	return (S + rand() % (S - E + 1)); //表示　S～E之間的一個隨機數，其實每次生成的數還是同一個
}
void wall(int n,int m){
	cout << " ";
	for (int i = 0; i < n; i++)
		cout << "-";
	cout << endl;
	for (int  j = 0; j < m; j++)
	{
		cout << "|";
		for (int r = 0; r < n; r++)
		{
			cout << " ";
		}
		cout << "|"<< endl;
	}
	cout << " ";
	for (int i = 0; i < n; i++)
		cout << "-";
}

void Food(){
	srand((unsigned)time(0)); //產生不可預見的隨機序列
	bool B=true;
	while (B)
	{
		food.x = random(1, s + 1);
		food.y = random(1, d + 1); 
		for (int i = 0; i < Snake_len; i++)
		{
			if (food.x == Snake[i].x && food.y == Snake[i].y)  //bug:如果新食物出現在蛇的身體上，它會消失，並且再也不出現食物
			{
				break;
			}
			B = false;  //只有所有的身體都通過 才能執行這一句  不行 還是有錯誤
		}	
	}
	Locate(food.x, food.y);
	cout << "$";
}

void move()
{
	point t ;
	t = Snake[Snake_len - 1];
	for (int i = Snake_len-1; i>=1 ; i--)
	{
		Snake[i] = Snake[i - 1];
	}
	Snake[0].x += Direct[Dir][0];
	Snake[0].y += Direct[Dir][1];
	Locate(Snake[1].x, Snake[1].y);
	cout << "*";
	//吃食
	if (Snake[0].x == food.x &&Snake[0].y == food.y)
	{
		Locate(food.x, food.y);
		cout << " ";
		Snake_len++;
		Snake[Snake_len - 1] = t;
		Food();
	}
	else
	{
		Locate(t.x, t.y);
		cout << " ";
	}
	Locate(Snake[0].x, Snake[0].y); 
	cout << "@"; //放在最後，因爲頭和食物重合後，會變成空白
}

bool alive()
{
	//撞牆
	if (Snake[0].x == 0 || Snake[0].x == s + 1 || Snake[0].y == 0  || Snake[0].y == d + 1)
	{
		Locate(s + 2, 0);
		cout << "撞牆了";
		return false;
	}
	//自撞
	for (int  i = Snake_len-1; i >0; i--)
	{
		if (Snake[0].x == Snake[i].x && Snake[0].y == Snake[i].y)
		{
			Locate(s + 2, 0);
			cout << "自撞了";
			return false;
		}
	}
	return true;
}
int main(){
	char ch,ch1;
	Dir = 3;
	Hide();
	wall(s, d);
	get_snake();
	Food();
	clock_t Start,now;

	while (1)
	{
		double delay = 400 - 30 * Hard;
		Start = clock();
		while (1)
		{
			now = clock();
			if (now - Start > delay) break;
		}
		if (_kbhit())   //上下左右 72,80,75,77
		{
			ch = _getch();
			if (ch == -32)
			{
				ch = _getch();
				switch (ch)
				{
					case 72:   //新方向
						if (Dir == 2 || Dir == 3)  //原方向 
							Dir = 0;
						break;
					case 80:
						if (Dir == 2 || Dir == 3)   
							Dir = 1;
						break;
					case 75:   
						if (Dir == 0 || Dir == 1)  
							Dir = 2;
						break;
					case 77:
						if (Dir == 0 || Dir == 1)   
							Dir = 3;
						break;
				}
			}
		}
		move();
		if (!alive()) break;
	}
	system("pause");
	return 0;
}

bug:如果新食物出現在蛇的身體上會消失，並且再也不出現食物  額