#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <ctime>

using namespace std;

void createMatr(int**&, int );
void input(int**, int);
void output(int**, int);
int SUM(int**, int);
int result(int, int, int);


int n, sum_A, sum_B, sum_C;
int** A, **B, **C;

int main()
{
	srand(time(NULL));

	cout << "Enter n: ";
	cin >> n; cout << endl;

	createMatr(A, n);
	createMatr(B, n);
	createMatr(C, n);


	input(A, n);
	input(B, n);
	input(C, n);


	output(A, n);
	sum_A = SUM(A, n);

	output(B, n);
	sum_B = SUM(B, n);

	output(C, n);
	sum_C = SUM(C, n);


	cout <<"result: "<< result(sum_A, sum_B, sum_C)<<endl;

	system("pause");

    return 0;
}


void createMatr(int**& Matr, int n) {
	Matr = new int*[n];
	for (int i = 0; i < n; i++)
		Matr[i] = new int[n];
};


void input(int** Matr, int n) {
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			Matr[i][j] = rand() % 10;
		}
	}

};


void output(int** Matr, int n) {
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			printf("%2d", Matr[i][j]);
		};
		cout << endl;
	}
	cout << endl;
};

int SUM(int** Matr, int n) {
	int sum = 0;
	for (int i = 0; i < n; i++) {
		for (int j = i; j < n; j++) {
			sum += Matr[i][j];
		}
	}
	cout << "sum is: " << sum << endl<<endl;
	return sum;
}

int result(int a, int b, int c) {
	return((a + b + c) / 3);
}