Rewrite the following function to use pointer arithmetic instead of array subscripting. Fill in the black boxes to complete the work.

#1 Anser Format: x+y, x-y, x/y, x*y, *x, *y

int sum_two_dimensional_array(const int a[][LEN], int n)

{

int i, j, sum = 0;

for (i = 0; i < n; i++)

for (j = 0; j < LEN; j++)

sum += a[i][j];

return sum;

}

int sum_two_dimensional_array(const int a[][LEN], int n)

{

int *p, sum = 0;

for (p = a[0]; p < a[0]+

#1

; p++)

sum +=

#2

;

return sum;

}