Hello! I was wondering if you can help me with Computer Science A.We has started

Question

Hello! I was wondering if you can help me with Computer Science A.We has started 2D arrays and for each loops and I do not understand my homework. Here's a sample question: Which traversals increment all elements in the matrix by 1? a. for (int[][] row: matrix) for (int e: row) e++; b. for (int i = matrix.length-1; i >= 0; i--) for (int j = matrix[i].length-1; j >= 0; j--) matrix[i][j] += 1; c. for (int row = 0; row < matrix.length; row++) doSomething(matrix[row]); private static void doSomething(int[] x) for (int i = 0; x.length; i++) x[i] =1;

Explanation / Answer

The basic logic behind the increment 1 on each element in the array is

first read the array and incerment it by 1 or any value

below is snip in java

         for(i = 0; i < n; i++)

        {

            a[i] = s.nextInt();

            a[i]++;//increment by one

        }

Here B is the correct answehe lemenet sin thr it reads the all the in the array 1 by 1 and incerment it by one.

for (int i = matrix.length-1; i >= 0; i--) // roeads up to length reaches to zero(row)
for (int j = matrix[i].length-1; j >= 0; j--)//roeads up to length reaches to zero(col)

matrix[i][j] += 1; //2-D indexing of element and increment by 1.

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