sample input :5
sample output:
* * *
*** *** ***
***** ***** *****
******* ******* *******
***************************
#include <stdio.h>
#include <stdlib.h>
void spacecircle(int n)
{
int i;
for(i = 1; i <= n; i++)
printf(" ");
}
void starcircle(int n)
{
int i;
for(i = 1; i <= 2 * n - 1; i++)
printf("%c", '*');
}
int main()
{
int N, i;
scanf("%d", &N);
for(i = 1; i <= N; i++)
{
spacecircle(N - i);
starcircle(i);
spacecircle(N - i);
spacecircle(N - i);
starcircle(i);
spacecircle(N - i);
spacecircle(N - i);
starcircle(i);
printf("\n");
}
return 0;
}