C++ 简单的控制台贪吃蛇小游戏

　　由于比较懒，所以不怎么写，觉得这样不应该。我应该对自己学的做出整理，不管是高端低端，写出来是自己的。

// 贪吃蛇.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include<iostream>
#include"Windows.h"
#include<ctime>


nData g_Snake[20];
nData g_Food;

using namespace std;
int _tmain(int argc, _TCHAR* argv[])                                                            
{
    int nKeyState = 0;
    int nSnakeMove = 5;
    int nSnakeLeng = 1;
    bool bSnake = false;
    

    //初始化食物
    srand((unsigned)time(NULL));
    g_Food.X = rand() % 18 + 1;
    g_Food.Y = rand() % 18 + 1;
    
    //初始化蛇头

    g_Snake[0].X = 5;
    g_Snake[0].Y = 6;

    while (true)
    {
        system("CLS");
        //开始菜单键盘输入
        if (nKeyState < 3)
        {
            if (KEY_DOWN(VK_DOWN))
            {
                nKeyState++;
                if (nKeyState > 2)
                {
                    nKeyState = 0;
                }
            }
            else if (KEY_DOWN(VK_UP))
            {
                nKeyState--;
                if (nKeyState < 0)
                {
                    nKeyState = 2;
                }
            }
            else if (KEY_DOWN(VK_RETURN))
            {
                if (nKeyState == e_Menu_StartGame)
                {
                    nKeyState = e_GO_StartGame;
                }
            }
        }
        //蛇动作
        else if (nKeyState == e_GO_StartGame)
        {
            //备份蛇头
            g_Snake[0].XOD = g_Snake[0].X;
            g_Snake[0].YOD = g_Snake[0].Y;

            if (KEY_DOWN(VK_UP))
            {
                if (nSnakeMove == e_Move_Down)
                {
                    nSnakeMove = e_Move_Down;
                }
                else
                {
                    nSnakeMove = e_Move_Up;
                }
            }
            else if (KEY_DOWN(VK_DOWN))
            {
                if (nSnakeMove == e_Move_Up)
                {
                    nSnakeMove = e_Move_Up;
                }
                else
                {
                    nSnakeMove = e_Move_Down;
                }
            }
            else if (KEY_DOWN(VK_LEFT))
            {

                if (nSnakeMove == e_Move_Right)
                {
                    nSnakeMove = e_Move_Right;
                }
                else
                {
                    nSnakeMove = e_Move_Left;
                }
            }
            else if (KEY_DOWN(VK_RIGHT))
            {
                if (nSnakeMove == e_Move_Left)
                {
                    nSnakeMove = e_Move_Left;
                }
                else
                {
                    nSnakeMove = e_Move_Right;
                }
            }
        }
        switch (nSnakeMove)
        {
        case e_Move_Up: g_Snake[0].X--; break;
        case e_Move_Down: g_Snake[0].X++; break;
        case e_Move_Left: g_Snake[0].Y--; break;
        case e_Move_Right: g_Snake[0].Y++; break;
        }

        //蛇撞墙
        if (nGameFrame[g_Snake[0].X][g_Snake[0].Y] == 1)
        {
            nKeyState = e_GO_GameOver;
        }
        //过关
        if (nSnakeLeng == 20)
        {
            nKeyState = e_Go_WinGame;
        }


        //蛇吃到自己`
        for (int i = 4; i <= nSnakeLeng; i++)
        {
            if (g_Snake[i].X == g_Snake[0].X&&g_Snake[i].Y == g_Snake[0].Y)
            {
                nKeyState = e_GO_GameOver;
            }
        }

        //遍历蛇身位置
        for (int i = 1; i < nSnakeLeng; i++)
        {
            g_Snake[i].XOD = g_Snake[i].X;
            g_Snake[i].YOD = g_Snake[i].Y;
            g_Snake[i].X = g_Snake[i - 1].XOD;
            g_Snake[i].Y = g_Snake[i - 1].YOD;
        }

        //吃到食物
        if (g_Food.X==g_Snake[0].X&&g_Food.Y==g_Snake[0].Y)
        {
            srand((unsigned)time(NULL));
            g_Food.X = rand() % 18 + 1;
            g_Food.Y = rand() % 18 + 1;
            nSnakeLeng++;
        }

        //渲染.
        if (nKeyState < 3)
        {
            cout << "■■■■■■■■■■■■■■■■■" << endl;
            cout << "■■■■■■■■■■■■■■■■■" << endl;
            cout << "■■■■                  ■■■■" << endl;
            if (nKeyState == e_Menu_StartGame)
            {
                cout << "■■■■   >-开始游戏     ■■■■" << endl;
                cout << "■■■■     游戏设置     ■■■■" << endl;
                cout << "■■■■     游戏结束     ■■■■" << endl;
            }
            else if (nKeyState == e_Menu_GameSet)
            {
                cout << "■■■■     开始游戏     ■■■■" << endl;
                cout << "■■■■   >-游戏设置     ■■■■" << endl;
                cout << "■■■■     游戏结束     ■■■■" << endl;
            }
            else if (nKeyState == e_Menu_EndGame)
            {
                cout << "■■■■     开始游戏     ■■■■" << endl;
                cout << "■■■■     游戏设置     ■■■■" << endl;
                cout << "■■■■   >-游戏结束     ■■■■" << endl;
            }
            cout << "■■■■                  ■■■■" << endl;
            cout << "■■■■■■■■■■■■■■■■■" << endl;
            cout << "■■■■■■■■■■■■■■■■■" << endl;
        }
        else if (nKeyState==e_GO_StartGame)
        {
            for (int i = 0; i < 20; i++)
            {
                for (int a = 0; a < 20; a++)
                {
                    for (int n = 1; n < nSnakeLeng; n++)
                    {
                        if (i == g_Snake[n].X&&a == g_Snake[n].Y)
                        {
                            bSnake = true;
                            break;
                        }
                        else
                        {
                            bSnake = false;
                        }
                    }
                    if (nGameFrame[i][a] == 1)
                    {
                        cout << "■";
                    }
                    else if (i == g_Snake[0].X&&a == g_Snake[0].Y)
                    {
                        cout << "◎";
                    }
                    else if (bSnake == true)
                    {
                        cout << "●";
                    }
                    else if (i == g_Food.X&&a == g_Food.Y)
                    {
                        cout << "◆"; 
                    }
                    else
                    {
                        cout << "  ";
                    }
                }
                cout << endl;
            }
        }
        else if (nKeyState == e_GO_GameOver)
        {
            cout << "GAME OVER"<<endl;
        }
        else if (nKeyState==e_Go_WinGame)
        {
            cout << "老铁666！"<<endl;
        }

    }
    return 0;
}