用C++实现的贪吃蛇游戏

我是一个C++初学者，控制台实现了一个贪吃蛇游戏。

代码如下：

//"贪吃蛇游戏"V1.0
//李国良于2016年12月29日编写完成#include <iostream>
#include <string>
#include <ctime>
#include <windows.h>
#include <conio.h>using namespace std;int food[2] = { 9, 9 };//初始食物坐标
int snake[1000][2];//蛇身坐标
int length = 1;//初始蛇长
int headX, headY;//蛇头坐标
int speed = 500;//游戏难度
int score = 0;//分数
int level = 1;//难度等级
string name;//玩家姓名void gotoxy(short x, short y);//移动光标
int setdirection(int x);//确定方向变量
void changesnake(int x);//改变蛇身坐标
void ifchangefood();//判断蛇是否吃到食物
void makefood();//创造新食物
bool judgelife();//判断蛇是否存活
void drawsnake();//画蛇
void drawfood();//画食物
void drawwall();//画墙
void drawscore();//画数据
void draw();//绘图int main()
{
SetConsoleTitle("贪吃蛇游戏");
int po = 2;//初始方向变量
snake[0][0] = 7;
snake[0][1] = 7;//初始蛇头坐标
headX = snake[0][0];
headY = snake[0][1];
gotoxy(30, 7);
cout << "欢迎来到贪吃蛇游戏";
gotoxy(30, 9);
cout << "作者：李国良 版本1.0";
gotoxy(30, 11);
cout << "请输入你的姓名：";
cin >> name;
system("cls");
gotoxy(30, 7);
cout << "游戏控制方式:";
gotoxy(30, 9);
cout << "W键:向上 S键:向下";
gotoxy(30, 11);
cout << "A键:向左 D键:向右";
gotoxy(30, 13);
cout << "空格键:暂停";
gotoxy(30, 15);
cout << "将游戏窗口最大化之后";
gotoxy(30, 17);
cout << "按回车键开始游戏...";
cin.get();
cin.get();
system("cls");
while (true)
{
po = setdirection(po);
system("cls");
changesnake(po);
ifchangefood();
if (!judgelife())
break;
draw();
Sleep(speed);
}
gotoxy(30, 10);
cout << "Game Over!!!";
Sleep(2000);
gotoxy(28, 12);
system("pause");
return 0;
}void gotoxy(short x, short y)
{
COORD position = { x, y };
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleCursorPosition(hOut, position);
}int setdirection(int x)
{
char ch;
if (_kbhit())
{
ch = _getch();
switch (ch)
{
case 'w':
x = 1;
break;
case 's':
x = 2;
break;
case 'a':
x = 3;
break;
case 'd':
x = 4;
break;
case ' ':
gotoxy(37, 16);
cout << "游 戏 暂 停. . .";
gotoxy(37, 18);
system("pause");
break;
default:
break;
}
}
return x;
}void changesnake(int x)
{
switch (x)
{
case 1:
headY -= 1;
break;
case 2:
headY += 1;
break;
case 3:
headX -= 1;
break;
case 4:
headX += 1;
break;
default:
break;
}
for (int i = length; i > 0; --i)
{
for (int j = 0; j < 2; ++j)
{
snake[i][j] = snake[i - 1][j];
}
}
snake[0][0] = headX;
snake[0][1] = headY;
}void ifchangefood()
{
if (snake[0][0] == food[0] && snake[0][1] == food[1])
{
length++;
makefood();
++score;
if (length > 5)
{
speed = 450;
level = 2;
}
if (length > 10)
{
speed = 400;
level = 3;
}
if (length > 15)
{
speed = 350;
level = 4;
}
if (length > 20)
{
speed = 300;
level = 5;
}
if (length > 25)
{
speed = 250;
level = 6;
}
if (length > 30)
{
speed = 200;
level = 7;
}
if (length > 35)
{
speed = 150;
level = 8;
}
if (length > 40)
{
speed = 100;
level = 9;
}
if (length > 45)
{
speed = 50;
level = 10;
}
}
}void makefood()
{
srand((unsigned)time(NULL));
food[0] = rand() % 30 + 2;
food[1] = rand() % 30 + 4;
for (int m = 0; m < length; ++m)
{
if (food[0] == snake[m][0] && food[1] == snake[m][1])
{
makefood();
break;
}
}
}bool judgelife()
{
for (int x = 1; x < length; ++x)
{
if (headX == snake[x][0] && headY == snake[x][1])
{
return false;
}}
if (headX < 1 || headY < 3 || headX > 34 || headY > 34)
return false;
else
return true;
}void drawsnake()
{
gotoxy(snake[0][0], snake[0][1]);
cout << "@";
for (int n = 1; n < length; ++n)
{
gotoxy(snake[n][0], snake[n][1]);
cout << "#";
}
}void drawfood()
{
gotoxy(food[0], food[1]);
cout << "$";
}void drawwall()
{
gotoxy(0, 0);
cout << "------------------------------------";
gotoxy(16, 1);
cout << "贪吃蛇";
gotoxy(0, 2);
cout << "++++++++++++++++++++++++++++++++++++";
gotoxy(0, 35);
cout << "------------------------------------";
for (int x = 0; x < 35; ++x)
{
gotoxy(0, x);
cout << "|";
gotoxy(35, x);
cout << "|";
}
}void drawscore()
{
gotoxy(37, 10);
cout << "分数：" << score;
gotoxy(37, 12);
cout << "等级：" << level;
gotoxy(37, 14);
cout << "玩家姓名：" << name;
}void draw()
{
drawsnake();
drawfood();
drawwall();
drawscore();
}


控制台游戏运行起来屏幕有点闪烁。。。