// Arrays

#include <iostream>
using namespace std;

//Pre-declarations
void print(int x[][4]);
int summation(int x[][4]);

int main ()
{  
	//Initialization
	int a[3][4] = {{2, 3, 1, 7}, {4, 0, 2, 5}, {1, 3, 1, 4}};
	int mysum = 0;
		
	print(a);   //Array variable name is sufficient
	mysum = summation(a);
	cout << endl << mysum << endl;

    return 0;
}

//For 2-D arrays, need to specify the column size.
int summation(int x[][4])
{
	int sum = 0;
	
	for (int i=0; i < 3; i++)
	{
		for(int j=0; j < 4; j++)
		{
			cout << x[i][j] << " " ;
			sum = sum + x[i][j];
		}
		cout << endl;
	}

	return sum;
}

//Print 2-D arrays
void print(int x[][4])
{
	for (int i=0; i < 3; i++)  //rows
	{
		for(int j=0; j < 4; j++) //columns
		{
			cout << x[i][j] << " " ;
		}
		cout << endl;
	}
}