#include<iostream>
#include<stdio.h>
#include<iomanip>

using namespace std;
void func(int ** arr, int n) {
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      arr[i][j] = 0;
    }
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++)
      cout << setw(4) << arr[i][j];
    cout << endl;
  }
}
int main() {
  int ** arr, n;
  cout << "Enter order of matrix:";
  cin >> n;
  cout << "-----------------------------------------------------" << endl;
  arr = new int * [n];
  for (int i = 0; i < n; i++) {
    arr[i] = new int[n];
  }
  func(arr, n);
  for (int i = 0; i < n; i++) {
    delete[] arr[i];
  }
  delete[] arr;
  return 0;
}

Posted via ActualForum NNTP Server 1.5

new int[n]();

void func(int** arr, int n) {
  const int border_thickness = 2; // толщина границы
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if ((border_thickness <= i) && (i < n - border_thickness)
        && (border_thickness <= j) && (j < n - border_thickness)) {
        // внутренняя часть
        arr[i][j] = 1;
      } else {
        // граница
        arr[i][j] = 0;
      }
    }
  }
  ...
}