#include <iostream>

using namespace std;

int random_in_range(int a, int b)
{ int r = random();
  int range = b - a + 1;
  return a + r % range; }

int average(int Array[][], int size1, int size2)
{ int sum = 0;
  for (int i = 0; i < size1; i += 1)
    for (int j = 0; j < size2; j += 1)
      sum += Array[i][j];
  return sum/(size1*size2); }

int main()
{ int A[8][7], B[5][5];
  srandomdev();

  for (int i = 0; i < 8; i += 1)
  { for (int j = 0; j < 7; j += 1)
    { A[i][j] = random_in_range(100, 999);
      cout << A[i][j] << " "; }
    cout << "\n"; }

  for (int i = 0; i < 5; i += 1)
  { for (int j = 0; j < 5; j += 1)
    { B[i][j] = random_in_range(100, 999);
      cout << B[i][j] << " "; }
    cout << "\n"; }

  cout << "\naverage of A is " << average(A, 8, 7) << "\n";
  cout << "\naverage of B is " << average(B, 5, 5) << "\n"; }