import java.util.Random;
import java.util.Scanner;

public class A9 {

    public static void main(String[] args) {

        int trees;
        double density;
        int treecount=0;
        int burncount=0;
        int burncount2=0;

        Scanner scan=new Scanner(System.in);

                //Error checking for number of trees
                do
                {   System.out.print("Enter number of trees: ");
                    trees=scan.nextInt();

                } while (trees<=10 || trees>=30);

                //Error checking for proper density amount
                do
                {
                    System.out.print("Enter tree density: ");
                    density=scan.nextDouble();
                } while (density<=.20 || density >=.80);
                scan.close();

                double [][] forest= new double [trees][trees];


                //fill the grid
                for (int row = 0; row < forest.length; row++) {
                    for (int col = 0; col < forest[row].length; col++) {
                        forest[row][col] = Math.random();
                    }
                }

                    System.out.println("");
                    System.out.println("The original forest:");
                    print2D(forest,density,treecount,trees);

                    System.out.println("The final forest:");
                    burn2D(forest,density,burncount,trees,burncount2);
                }





                public static void print2D (double [][] a,double d,int c,int t ) {

                    //Prints the original forest
                    for(int i = 0; i <a.length; i++) {
                        for(int j = 0; j < a[i].length; j++) {

                            if (a[i][j]<d) {
                                System.out.print('T'+" ");
                                c++;}
                            else
                                System.out.print('.'+" ");

                        }
                        System.out.println();
                        }
                        System.out.println("Percent populated: "+(double)c/Math.pow(t, 2));
                        System.out.println("");

                    }


                public static void burn2D (double[][] a,double d, int c, int t,int c2) {

                    //Ignites the first row of 2D array on fire
                    for(int q = 0; q <1; q++) {
                        for(int p = 0; p < t; p++) {

                            if (a[q][p]<d) {
                                System.out.print('B'+" ");
                                c2++;}
                            else
                                System.out.print('.'+" ");

                        }
                         System.out.println();


        //Problems are with this nested for loop
                    for(int i = 1; i <a.length; i++) {
                        for(int j = 0; j < a[i].length; j++) {

                                if (a[i][j-1]=='B') //checks row above for 'B'
                                System.out.print('B'+" ");

                                else if (a[i+1][j-1]=='B') { //checks top right for 'B'
                                    System.out.print('B'+" ");
                                }

                                else if (a[i-1][j-1]=='B') { //checks top left for 'B'
                                    System.out.print('B'+" ");
                                }


                                else if (a[i][j]<d) {
                                System.out.print('T'+" ");
                                c++;}

                                else
                                System.out.print('.'+" ");

                        }
                         System.out.println();

            }


        }
    }
}