棋盘覆盖

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public class chess_cover {
    private static int[][] matrix = new int[100][100];
    private static int num = 0;
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("请输入棋盘的大小：");
        String Str_size = in.nextLine();
        int size = Integer.parseInt(Str_size);
        System.out.print("请输入特殊方格的位置：");
        String Str_position = in.nextLine();
        int row = Integer.parseInt(Str_position.split(" ")[0]);
        int col = Integer.parseInt(Str_position.split(" ")[1]);
        chess_board(0,0,row,col,size);
        for(int i=0;i<size;i++){
            for(int j=0;j<size;j++){
                System.out.print(matrix[i][j]+" ");
            }
            System.out.println();
        }
    }
    private static void chess_board(int tr,int tc,int dr,int dc,int size)
    {
        if(size==1)
            return;
        int s=size/2;       //分割棋盘
        int t=++num;        //L型骨牌
        if(dr<tr+s&&dc<tc+s){    //特殊方格在左上棋盘
            chess_board(tr,tc,dr,dc,s);
        }else {                  //特殊方格不在，在右下角设置特殊方格
            matrix[tr+s-1][tc+s-1]=t;
            chess_board(tr,tc,tr+s-1,tr+s-1,s);
        }
        if(dr>=tr+s&&dc<tc+s){
            chess_board(tr+s,tc,dr,dc,s);
        }else {
            matrix[tr+s][tc+s-1]=t;
            chess_board(tr+s,tc,tr+s,tc+s-1,s);
        }
        if(dr<tr+s&&dc>=tc+s){
            chess_board(tr,tc+s,dr,dc,s);
        }else {
            matrix[tr+s-1][tc+s]=t;
            chess_board(tr,tc+s,tr+s-1,tc+s,s);
        }
        if(dr>=tr+s&&dc>=tc+s){
            chess_board(tr+s,tc+s,dr,dc,s);
        }else {
            matrix[tr+s][tc+s]=t;
            chess_board(tr+s,tc+s,tr+s,tc+s,s);
        }
    }
}