二维数组迷宫趣题

Posted 2022-11-26 Richard_i

import java.util.Scanner;

/**
 *  A代表人物
 *  核心思路，交换元素下标位置，走出迷宫
 */
public class TwoDimensionalMap 
    public static void main(String[] args) 
        char[][] map=
                '*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*',,
                '*','|','|','|','|','|','|','*','|','|','|','|','|','|','|','|','*','|','|','|','*',,
                '*','|','*','*','*','*','|','*','*','*','*','*','*','|','|','|','*','|','*','|','*',,
                '*','|','*','*','|','|','|','|','|','*','*','*','*','*','*','|','*','|','*','|','*',,
                '*','|','*','*','|','*','|','*','*','*','|','|','|','|','|','|','|','*','*','|','*',,
                '*','|','*','*','|','*','|','*','*','*','*','*','*','*','*','*','|','*','*','|','*',,
                '*','|','*','*','|','*','|','*','|','|','|','|','|','|','|','*','|','*','*','|','*',,
                '*','|','*','|','|','*','|','*','|','*','*','*','*','*','|','*','|','*','*','|','*',,
                '*','|','*','|','*','*','|','*','|','*','*','*','*','*','|','*','|','*','*','|','*',,
                '*','|','*','|','*','*','|','*','|','|','|','|','*','*','|','*','|','*','*','|','*',,
                '*','|','*','|','*','*','|','*','*','*','*','|','*','*','|','*','|','|','*','|','*',,
                '*','|','*','|','*','*','|','*','*','*','*','|','*','*','|','*','|','|','*','|','*',,
                '*','|','*','|','|','|','|','|','|','|','|','|','*','*','|','*','*','|','*','|','*',,
                '*','|','*','*','*','*','|','*','*','*','*','*','*','*','|','*','*','|','*','|','*',,
                '*','|','*','*','*','*','|','*','*','*','*','*','*','*','|','*','|','|','*','|','*',,
                '*','|','|','|','*','*','|','*','*','*','*','|','|','|','|','*','|','|','|','|','*',,
                '*','*','*','|','*','*','*','*','*','*','*','|','*','*','|','|','|','|','*','|','*',,
                '*','*','*','|','|','|','|','|','|','*','*','|','*','*','*','*','*','|','*','|','*',,
                '*','*','*','*','*','*','*','*','|','*','*','|','*','*','*','*','*','|','*','|','*',,
                '*','*','*','|','|','|','|','|','|','*','*','|','*','*','*','*','*','|','*','|','*',,
                '*','*','*','|','*','*','*','*','*','*','|','|','|','|','|','*','*','|','*','|','*',,
                '*','*','*','|','*','|','|','|','|','|','|','*','*','*','|','|','|','|','*','|','*',,
                '*','*','*','|','*','*','*','*','*','*','*','*','*','*','*','*','*','*','*','A','*',
        ;
//        System.out.println(map.length);   // 行 23
//        System.out.println(map[0].length); // 列 21列
//        人物A的索引
        char userA;
        int startX = 22;
        int startY = 19;
//        System.out.println("人物" + map[startX][startY]);
//        出口索引
        int endX = 22;
        int endY = 3;
//        遍历地图
        for (int i = 0; i < map.length ; i++) 
            for (int j = 0; j < map[i].length; j++) 
                System.out.print(map[i][j] + " ");
            
            System.out.println();
        
        while (true)
        Scanner scanner = new Scanner(System.in);
        System.out.println("请通过WASD键位，移动人物走出迷宫");
//        返回 char指定索引处的值。 意为用户输入的首字母
        char user = scanner.next().charAt(0);
            switch (user)
                // 向上
                case 'w': case 'W':
                /*
                    人物A往上则startX-1,判断是否为*(墙)
                    交换数组下标位置，完成移动
                */
                    if (map[startX-1][startY] != '*')
                        userA = map[startX][startY];
                        map[startX][startY] = map[startX-1][startY];
                        map[startX-1][startY] = userA;
                        startX--;
                    
                    break;
                case 'a': case 'A':
                    // 向左
                    if (map[startX][startY-1] != '*')
                        userA = map[startX][startY];
                        map[startX][startY] = map[startX][startY-1];
                        map[startX][startY-1] = userA;
                        startY--;
                    
                    break;
                case 's': case 'S':
                    // 向下
                /*
                    人物A往上则startX+1,往下有下标越界的风险，需要对其进行控制
                    startX+1 < map.length ,不能大于数组列数
                    交换数组下标位置，完成移动
                */
                    if ((startX+1) < map.length && map[startX+1][startY] != '*')
                        userA = map[startX][startY];
                        map[startX][startY] = map[startX+1][startY];
                        map[startX+1][startY] = userA;
                        startX++;
                    
                    break;
                case 'd': case 'D':
                    // 向左
                    if (map[startX][startY+1] != '*')
                        userA = map[startX][startY];
                        map[startX][startY] = map[startX][startY+1];
                        map[startX][startY+1] = userA;
                        startY++;
                    
                    break;
            
            //用户操作遍历地图，刷新地图显示人物当前位置
            for (int i = 0; i < map.length ; i++) 
                for (int j = 0; j < map[i].length ; j++) 
                    System.out.print(map[i][j] + " ");
                
                System.out.println();
            
            // 人物索引下标等于出口下标时，跳出循环，结束
            if (startX == endX && startY == endY)
                System.out.println("恭喜通过，即将进入下一关卡...");
                break;