print a diamond using 1 for loop.c

print a diamond using 1 for loop.c

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char str1[] = "********************************************";
    char str2[] = "                                            ";

    int space = 1, star, initial_star;
    scanf("%d", &star);
    initial_star = star;

    for(space = 1; star * (-1) <=
     initial_star; space += 2, star--)
    {
        if(star >= 0)
            printf("%.*s%.*s%.*s\n", star, str1, space, str2, star, str1);
        else
            printf("%.*s%.*s%.*s\n", (-1)*star, str1, space - 2 * 2 * (-1) * star, str2, (-1)*star, str1);
    }

    return 0 ;
}