any one can help me with this please

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  // C++ program to generate odd sized magic squares
  #include <bits/stdc++.h>
  using namespace std;
   
  // A function to generate odd sized magic squares
  void generateSquare(int n)
  {
      int magicSquare[n][n];
   
      // set all slots as 0
      memset(magicSquare, 0, sizeof(magicSquare));
   
      // Initialize position for 1
      int i = n / 2;
      int j = n - 1;
   
      // One by one put all values in magic square
      for (int num = 1; num <= n * n;) {
          if (i == -1 && j == n) // 3rd condition
          {
              j = n - 2;
              i = 0;
          }
          else {
              // 1st condition helper if next number
              // goes to out of square's right side
              if (j == n)
                  j = 0;
   
              // 1st condition helper if next number
              // is goes to out of square's upper side
              if (i < 0)
                  i = n - 1;
          }
          if (magicSquare[i][j]) // 2nd condition
          {
              j -= 2;
              i++;
              continue;
          }
          else
              magicSquare[i][j] = num++; // set number
   
          j++;
          i--; // 1st condition
      }
   
      // Print magic square
      cout << "The Magic Square for n=" << n
           << ":\nSum of "
              "each row or column "
           << n * (n * n + 1) / 2 << ":\n\n";
      for (i = 0; i < n; i++) {
          for (j = 0; j < n; j++)
   
              // setw(7) is used so that the matrix gets
              // printed in a proper square fashion.
              cout << setw(4) << magicSquare[i][j] << " ";
          cout << endl;
      }
  }
   
  // Driver code
  int main()
  {
   
      // Works only when n is odd
      int n = 7;
      generateSquare(n);
      return 0;
  }
   
  // This code is contributed by rathbhupendra

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