68_star_17.c

#include <stdio.h>
int main()
{
        int i, j, k;
        for (i = 1; i <= 9; i++)
        {
                i <= 5 ? k++ : k--;
                for (j = 1; j <= 9; j++)
                {
                        if (j <= 6 - k || j >= 4 + k)
                                printf("*");
                        else
                                printf(" ");
                }
                printf("\n");
        }
        return 0;
}