Design a function that prints out a plus sign composed of '+' characters that is n lines high and n lines wide. We'll have the user provide n via prompt, and output an error if n is even.

  #include <iostream>
  #include <string>
  using namespace std;
  
  int main () {
      int dimensions;
  
      cout << "Input an odd dimension: ";
      cin >> dimensions;
  
      if (dimensions % 2 == 0) {
          cout << "Invalid dimensions!" << endl;
          return 1;
      }
  
      for (int i = 0; i < dimensions; i++) {
          for (int j = 0; j < dimensions; j++) {
              if (j == dimensions / 2 || i == dimensions / 2) {
                  cout << "+";
              } else {
                  cout << " ";
              }
          }
          cout << endl;
      }
  }