^_^编的第一个游戏，贪吃蛇（一道acm题）

#include <iostream>
using namespace std;

class Node
{
    friend int main();
private:
    int row;            //记录蛇中每一个节点的位置
    int column;
    
};
int main()
{
    int n;     //要走多少步
    
    while(cin >> n && n!=0)
    {
    int a[52][52];     //设置一个50×50大小的地方
    for (int i =0;i <= 51;i ++)
        for (int j = 0;j <=51;j ++)
            a[i][j] = 0;
    for (int i = 0,j = 0;j <= 51;j ++)
        a[i][j] = -1;
    for (int i = 51,j = 0;j <= 51;j ++)
        a[i][j] = -1;
    for (int i = 1,j = 0;i <= 50;i ++)
        a[i][j] = -1;
    for (int i = 1,j = 51;i <=50;i ++)
        a[i][j] = -1;
    for (int i = 25,j = 11;j <= 30;j ++)
        a[i][j] = 1;
    
    
    char action[101];
    cin >> action;
    Node snake[21];
    for (int i = 1;i <= 20;i ++)    //初始化蛇
    {
        snake[i].row = 25;
        snake[i].column = 30-i+1;
    }
    int step = 1;
    int temprow=snake[1].row,tempcolumn=snake[1].column;
    for (;step <= n;step ++)
    {
        
        //改变最后一个节点原来所占位置的值，变为0
        a[snake[20].row][snake[20].column] = 0;
        for (int i = 2;i <=20;i ++)
        {
            
            int temprow1 = snake[i].row;
            int tempcolumn1 = snake[i].column;
            snake[i].row = temprow;
            snake[i].column = tempcolumn;
            temprow = temprow1;
            tempcolumn = tempcolumn1;
            
            cout << snake[i].row << ' ' <<snake[i].column<<endl;
        }
        temprow = snake[1].row;
        tempcolumn = snake[1].column;
        
        if (action[step-1] == 'N')
        {    
            snake[1].row++;
            if (snake[1].row == 51)
            {
                cout << "The worm ran off the board on move " << step <<endl;
                break;
            }
        }
        else if (action[step-1] == 'S')
        {
            snake[1].row--;
            if (snake[1].row == 0)
            {
                cout << "The worm ran off the board on move " << step <<endl;
                break;
            }
        }
        else if (action[step-1] == 'W')
        {
            snake[1].column--;
            if (snake[1].column == 0)
            {
                cout << "The worm ran off the board on move " << step <<endl;
                break;
            }
        }
        else if (action[step-1] == 'E')
        {
            snake[1].column++;
            if (snake[1].column == 51)
            {
                cout << "The worm ran off the board on move " << step <<endl;
                break;
            }
        }
        
        if (a[snake[1].row][snake[1].column] == 1)
        {
            
            cout << "The worm ran into itself on move " << step << endl;
            break;
        }
        //把这次蛇头占的位置变成1
        a[snake[1].row][snake[1].column] = 1;
        for (int i =51;i >= 0;i --)
        {
                for (int j = 0;j <=51;j ++)
                    cout<<a[i][j];
                cout <<endl;
        }

    if (step == n)
        cout << "The worm successfully made all " << step << endl;
    }
    
    }
}
^_^：
不会做成图形界面，
游戏规则：
输入：
一次性输入你要走的步数和各步的方向
比如说：
18
NWWWWWWWWWWSESSSWS                    //第一次游戏
20
SSSWWNENNNNNWWWWSSSS                  //第二次游戏
30
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEE         //第三次游戏
13
SWWWWWWWWWNEE                         //第4次游戏

TAG: 贪食蛇