package Array;
//稀疏数组
public class Study09 {
    //棋盘
    public static void main(String[] args) {
        //创建一个二维数组 11*11 0：没有棋子 1；黑棋  2：白棋
        int[][] array1 = new int[11][11];
        array1[1][2] = 1;
        array1[2][3] = 2;
        //输出原始数据
        System.out.println("输出原始数据");
        for (int[] ints : array1) {
            for (int anInt : ints) {
                System.out.print(anInt + "\t");
            }
            System.out.println();
        }
        System.out.println("========================");
        //转换为稀疏数组保存
        //获取有效数组个数
        int sum = 0;
        for (int i = 0; i < 11; i++) {
            for (int j = 0; j < 11; j++) {
                if (array1[i][j] != 0) {
                    sum++;
                }
            }
        }
        System.out.println("输出有效值的个数:" + sum);
        //创建一个稀疏数组
        int array2[][] = new int[sum + 1][3];//行，列，值
        array2[0][0] = 11;//原始位置
        array2[0][1] = 11;//行
        array2[0][2] = sum;//列
        //遍历二维数组，将非零数组存入稀疏数组
        int count = 0;
        for (int i = 0; i < array1.length; i++) {
            for (int j = 0; j < array1[i].length; j++) {
                if (array1[i][j] != 0) {
                    count++;
                    array2[count][0] = i;//横坐标
                    array2[count][1] = j;//纵坐标
                    array2[count][2] = array1[i][j];//值
                }
            }
        }
        //输出稀疏数组
        System.out.println("输出稀疏数组");

        for (int i = 0; i < array2.length; i++) {
            System.out.println(array2[i][0] + "\t"
                    + array2[i][1] + "\t"
                    + array2[i][2] + "\t");
        }

            System.out.println("========================");
            System.out.println("还原");
            //读取稀疏数组
            int array3[][] = new int[array2[0][0]][array2[0][1]];

            //给其中元素还原值
            for (int i = 1; i < array2.length; i++) {
                array3[array2[i][0]][array2[i][1]] = array2[i][2];
            }
            //打印
            System.out.println("输出原始数据");
            for (int[] ints : array3) {
                for (int anInt : ints) {
                    System.out.print(anInt+"\t");
                }
                System.out.println();
            }


        }
    }