package Array;
//稀疏陣列
public class Study09 {
    //棋盤
    public static void main(String[] args) {
        //建立一個二維陣列 11*11 0：沒有棋子 1；黑棋  2：白棋
        int[][] array1 = new int[11][11];
        array1[1][2] = 1;
        array1[2][3] = 2;
        //輸出原始資料
        System.out.println("輸出原始資料");
        for (int[] ints : array1) {
            for (int anInt : ints) {
                System.out.print(anInt + "\t");
            }
            System.out.println();
        }
        System.out.println("========================");
        //轉換為稀疏陣列儲存
        //獲取有效陣列個數
        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("輸出有效值的個數:" + sum);
        //建立一個稀疏陣列
        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
        //遍歷二維陣列，將非零陣列存入稀疏陣列
        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;//橫座標
                    array2[count][1] = j;//縱座標
                    array2[count][2] = array1[i][j];//值
                }
            }
        }
        //輸出稀疏陣列
        System.out.println("輸出稀疏陣列");

        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("還原");
            //讀取稀疏陣列
            int array3[][] = new int[array2[0][0]][array2[0][1]];

            //給其中元素還原值
            for (int i = 1; i < array2.length; i++) {
                array3[array2[i][0]][array2[i][1]] = array2[i][2];
            }
            //列印
            System.out.println("輸出原始資料");
            for (int[] ints : array3) {
                for (int anInt : ints) {
                    System.out.print(anInt+"\t");
                }
                System.out.println();
            }


        }
    }