Zadanianko

#include <iostream>
using namespace std;
#define SIZE 15

int main()
{
	int a = SIZE, j, i, m=0, k=0;
	char tab[SIZE][SIZE];
	for (a; a > SIZE / 2; a -= 2)
	{
		for (i = m; i < a; i++)
		{
			for (j = k; j < a; j++)
			{
				tab[i][j] = (i + a == SIZE || j+a==SIZE||j==a-1||i==a-1) ? '*' : ' ';
			}
		}
		m += 2;
		k += 2;
}
	for (i = 0; i < SIZE; i++)
	{
		for (j = 0; j < SIZE; j++)
		{
			cout << tab[i][j];
		}
		cout << endl;
	}
}