hollow square


#include 

int main() {
    int i, j, n = 5;
    for(i = 1; i <= n; i++) {
        for(j = i; j < n; j++) printf(" ");    
        for(j = 1; j <= (2*i-1); j++) {       
            if(j == 1 || j == (2*i-1) || i == n)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }
}


    *
   * *
  *   *
 *     *
*********