Passing a 2d array and using recursion error - arrays

Question

I am doing an assignment and have trouble getting the code compiled. The code must have recursion. The idea is to pass a 2d array sequentially - row by row, column by column and to get a private helper method to match cases and return the result.
I have tried looking at different solutions and everything seems in order, however I get an error:
required: int
found: int[][]
I am passing an array, int row and int column to a method that should be accepting exactly those three.
Take a look:
public static int [][] calculateProximity ( boolean [][] mineField )
{
int [][] proximityField = new int [mineField.length][mineField[0].length];
for (int row = 0; row < mineField.length; row++) {
for (int column=0; column <mineField[row].length; column++) {
proximityField [row][column] = calculateProximity (mineField, row, column);
}
}
return proximityField;
}
private static int [][] calculateProximity (boolean [][] mineField,
int row, int column)
{
int [][] proximityField;
if (row >= mineField.length || column >= mineField[row].length){
return proximityField=0;
}
else if (mineField [row][column]= true){
proximityField[row][column]=1;
return proximityField;
}
else
{
proximityField[row][column]=0;
}
return proximityField;
}
By the way, calculateProximity main method is to return an int 2d array, but it is given a boolean 2d array.

Answer 1

return proximityField=0;, is incorrect. Here, you are returning the result of proximityfield=0. This is going to be a single integer, the value 0. When you assign a variable, the return value is the value you assigned to the variable. You should probably return null instead.

Answer 2

Never use loops while performing recursion. I hope this code gives you some idea:
#include<stdio.h>
#include<stdlib.h>
int i=0,j=0,k=0,flag=0;
int function_Matrix(int arr[][4],int i,int j)
{
if(j==4||i==3)
return 1;
if(flag==0)
{
printf("\t%d",arr[i][j]);
}
function_Matrix(arr,i,j+=1);
printf("\n");
function_Matrix(arr,i+=1,j=0);
flag=1;
}
int main()
{
int x;
int arr[][4]={{1,2,3,4},
{5,6,7,8},
{9,7,6,5}};
function_Matrix(arr,0,0);
}