#include <iostream>

using namespace std;

const int NUM_ROWS = 2;
const int NUM_COLS = 3;

void sumCols(int nums[][NUM_COLS], int tots[], int rows, int cols);

void printArray(int nums[], int count);

int main()
{
	// Declare a 2D array of integers named numbers with NUM_ROWS rows and NUM_COLS cols
	int numbers[NUM_ROWS][NUM_COLS];

	// Declare a 1D array of integers named totals with size NUM_COLS
	int totals[NUM_COLS];

	// Write a loop to initialize all the values in totals to 0
	for (int i=0; i<NUM_COLS; ++i)
		totals[i] = 0;

	// Write a nested loop to initialize all the values in numbers to row # * column #
	// For example, numbers[0][0] will be 0, numbers [1][2] will be 2
	for (int r=0; r < NUM_ROWS; ++r)
		for (int c=0; c < NUM_COLS; ++c)
			numbers[r][c] = r*c;

	// Write a function call to sumCols, passing in the array numbers, the array totals,
	// NUM_ROWS and NUM_COLS as the number of rows and columns
	sumCols(numbers, totals, NUM_ROWS, NUM_COLS);

	// Write a function call to printArray to print the values in totals
	printArray(totals, NUM_COLS);

	// Draw the contents of the array numbers.  TRACE THE CALL TO sumCols.  
	// Draw the contents of the array totals after the call has executed






	// In sumCols, why don't you need to pass the array tots by reference??




}

void sumCols(int nums[][NUM_COLS], int tots[], int rows, int cols)
{
	for (int c=0; c < NUM_COLS; ++c)
		for (int r=0; r < NUM_ROWS; ++r)
			tots[c] += nums[r][c];
}

void printArray(int nums[], int count)
{
	for (int i=0; i<count; ++i)
		cout << nums[i] << endl;
}