gistfile1.txt

#include <iostream>
using namespace std;

int main()
{
    int n;
    cout << "Enter size: ";
    cin >> n;
    int matrix[30][30];

    for (int i = 0; i < n; i++) 
    {
        for (int j = 0; j < n; j++) 
        {
            if (i == n / 2 || j == n / 2) 
            {
                matrix[i][j] = 1;
            }
            else 
            {
                matrix[i][j] = 0;
            }
        }
    }

    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < n; ++j)
        {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }
}