Error while running the program

#1

Can you please figure out the issue with my solution

#2

@indrabijaynarayan,
Please share your code as well.

#3

public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc = new Scanner(System.in); System.out.println(“Enter the total Columns”); int col = sc.nextInt(); System.out.println(“Enter the total row”); int row = sc.nextInt(); char [][] board = new char[row][col]; for(int r=0;r<row;r++){ for(int c=0;c<col;c++){ System.out.println("Enter the value for row: "+r + " column: "+c); board[r][c]= sc.next().charAt(0); } } //int[][] board = {{0,‘X’,0,0}, {0,0,0,0}, {0,‘X’,0,0}, {0,0,‘X’,0}}; blockMazeWR(board, 0,0, “”); } public static void blockMazeWR(char [][] maze, int row, int col, String ans){ if(row == maze.length-1 && col == maze[0].length-1){ if(ans.length()>0){ System.out.println(ans); } else{ System.out.println(-1); } return; } if(row==-1 || row == maze.length || col == -1 || col == maze[0].length || maze[row][col]==‘X’){ //System.out.println(-1); return; } if(maze[row][col]==‘O’){ //place // //Top //blockMazeWR(maze, row-1, col, ans+“T”, visited); //Down blockMazeWR(maze, row+1, col, ans+“1”); //Left //blockMazeWR(maze, row, col-1, ans+“L”, visited); //Right blockMazeWR(maze, row, col+1, ans+“1”); //visited[row][col] = false; } }

#4

@indrabijaynarayan,
Can you share via https://ide.codingblocks.com/
The code is not at all in a readable format.

#5

how can I share my code.

#6

@indrabijaynarayan,
open https://ide.codingblocks.com/
select correct language.
paste your code.
press ctrl+s and then click on save.
share the link.

#7
#8

Please help me , how can I resolve this issue

#9

@indrabijaynarayan,
First, what are you taking input in n as?

You need only input of row and col. Also, don’t print statements like these: " // System.out.println(“Enter the total row”);"

You need to follow the format given in the sample test case.

Also in the input format, first take input of row then column. And you have taken input of a char array but passed the board array as int. So please correct that as well.

Suggested approach:
If destination is reached print the solution matrix .
Else .
a) Mark current cell in solution matrix as 1.
b) Move forward in the horizontal direction and recursively check if this move leads to a solution.
c) If the move chosen in the above step doesn’t lead to a solution then move down and check if this move leads to a solution.
d) If none of the above solutions works then unmark this cell as 0 (BACKTRACK) and return false

#10

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