[Pattern][C++] A pattern program

#include <iostream>
using namespace std;
void printSpace(int n) {
  for (int i = 0; i < n; i++) {
    cout << " ";
  }
}
bool isOdd(int n) {
  return n % 2 != 0;
}
int countOdd(int n) {
  int i = 2, count = 1;
  if (n <= 1) {
    return 1;
  }
  while (i++ != n) {
    if (i % 2 != 0) {
      count++;
    }
  }
  return count;
}
void PH(int n, int tc) {
  int k = 0;
  for (int r = 1; r <= tc; r++, k = 0) {
    printSpace(tc + (n + 2));
    printSpace(tc - r);
    while (k != 2 * r - 1) {
      cout << "@";
      ++k;
    }
    cout << endl;
  }

  for (int r = 1; r <= tc; r++, k = 0) {
    printSpace(tc + (n + 2));
    cout << "*";
    cout << endl;
  }
}
void PV(int n, int tc) {
  int k = 0;
  for (int r = 1; r <= n / 2; r++, k = 0) {
    printSpace(tc - r);
    for (int i = 1; i <= r; i++)
      cout << "@";
    printSpace(n + 2);
    cout << "*";
    cout << "\n";
  }
  // lower half
  for (int r = (n / 2) + 1; r >= 1; r--) {
    printSpace(((n / 2) + 1) - r);
    for (int j = r; j <= 2 * r - 1; ++j)
      cout << "@";
    if (r == (n / 2) + 1) {
      for (int i = 0; i < n + 3; i++)
        cout << "*";
    }
    cout << endl;
  }
}
int main() {
  int N;
  cout << "Enter value: ";
  cin >> N;
  if (!isOdd(N)) {
    cout << "\nPlease enter a Odd Number";
    return 1;
  }
  int total_cols = countOdd(N);
  PH(N, total_cols);
  PV(N, total_cols);
  return 0;
}