Untitled

#include <iostream>

using namespace std;

int main() {
    int n;

    cout << "Enter an odd positive integer n: ";
    cin >> n;

    if (n <= 0 || n % 2 == 0) {
        cout << "Invalid input. Program terminated." << endl;
        return 0;
    }

    int center = n / 2;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (i < center && j < center) {
                if (i == j) {
                    cout << "*";
                } else {
                    cout << "+";
                }
            } else if (i > center && j > center) {
                if (i == j) {
                    cout << "*";
                } else {
                    cout << "x";
                }
            } else {
                cout << " ";
            }
        }
        cout << endl;
    }

    return 0;
}