Remove trailing white spaces on X pattern

#include <iostream>
#include <iomanip>
void draw_x(int n) {
  int r, c;
  for (r = 1; r <= n; r++) {
    for (c = 1; c <= n; c++) {
      if (r == c || c == (n + 1) - r) {
        std::cout << "*";
      } else {
        std::cout << "_";
      }
    }
    std::cout << std::endl;
  }
}

int main() {
  int n;
  std::cin >> n;
  if (n % 2 == 0) {
    std::cout << "Sorry, not odd" << std::endl;
  } else {
    draw_x(n);
  }
}

Here is my code, how would I remove any extra underscores on the right after it is printed?

The image shows the underscore in the middle on the right and I dont know how to remove it within my code.