#include <iostream>
#include <stdio.h>

#define ROWS 3
#define COLS 5

struct ARRAYSTRUCT {
	int A[ROWS][COLS];
};

int sum(ARRAYSTRUCT * mystruct) {
  int total = 0;
  for (int i = 0; i < ROWS; i++)
     for (int j = 0; j < COLS; j++)
        total += mystruct->A[i][j];
  return total ;
}

int main() {
  int i, j ;
  //int A[ROWS][COLS] ;
  ARRAYSTRUCT mystruct;

  for ( i = 0; i < ROWS; i++ ) { for ( j = 0; j < COLS; j++ ) mystruct.A[i][j] = rand() ; }
  for ( i = 0; i < ROWS; i++ ) { for ( j = 0; j < COLS; j++ ) printf( "A[%d][%d] == %d\n", i, j, mystruct.A[i][j] ) ; }
  int total = sum( &mystruct ) ;
  printf("\nTotal: %d\n\n", total);
  return 0 ;
}