#include <iostream>
using namespace std;

const int ROWS = 5;			// global variable for max size of int array
const int COLS = 4;

void ReadChars(char[][3],int rows, int cols);
void WriteCharRows(char[][3], int rows, int cols);
void WriteIntRows(int [][COLS], int rows, int cols);
void WriteIntCols(int[][COLS], int rows, int cols);
void WriteCharDiag(char[][3], int rows);

int main()
{
	
	int Nums[ROWS][COLS] = { 0,  1,  2,  3,
							 4,	 5,  6,  7,
							 8,  9,	10, 11,
							12, 13, 14, 15,
							16, 17, 18, 19};
	char Ch[3][3];  // a two dimensional character array

	ReadChars(Ch, 3, 3);
	WriteCharRows(Ch, 3, 3);
	WriteIntRows(Nums, ROWS, COLS);
	WriteIntCols(Nums, ROWS, COLS);
	WriteCharDiag(Ch, 3);

	return 0;

}

	void ReadChars(char Ch[][3], int rows, int cols)
	{
	// walk through the character array read in values row by row
	int i, j;
	cout << "Please enter " << rows * cols << " characters " << endl;
	for (i = 0; i < rows; i ++)  // for each row
		for (j = 0; j < cols; j++) // for each col element
			cin >> Ch[i][j];    // read in the value
	return;
	}

	void WriteCharRows(char Ch[][3], int rows, int cols)
	{
		int i, j;
	// walk through the character array writing out the values row by row
	cout << endl << " character array displayed row by row" << endl;
	for (i = 0; i < rows; i++)
	{
		for (j=0; j < cols; j++)
			cout << Ch[i][j] << " ";
		cout << endl;
	}
	return;
	}


	void WriteIntRows(int Nums[][COLS], int rows, int cols)
	{
	// walk through the integer array writing out the values row by row
		int i, j;
	cout << endl <<" integer array displayed row by row" << endl;
	for (i = 0; i < rows; i++)     // for each row
	{
		for (j = 0; j < cols; j++) // for each col element
			cout << Nums[i][j] << " ";
		cout << endl;
	}
	return;
	}


	void WriteIntCols(int Nums[][COLS], int rows, int cols)
	{
	// walk through the integer array writing out the values col by col
		int i, j;
	cout << endl <<" integer array displayed col by col" << endl;
	for (j = 0; j < cols; j++)     // for each col
	{
		for (i = 0; i < rows; i++) // for each row element
			cout << Nums[i][j] << " ";
		cout << endl;
	}
	return;
	}

	void WriteCharDiag(char Ch[][3], int rows)
	{
	// write out the upper left to lower right diagonal elements of the character array
		int i;
	cout << endl << " character array major diagonal elements" << endl;
	for (i = 0; i < rows; i++)
		cout << Ch[i][i];
	cout << endl;
	return;
	}