~cpp
#include <stdio.h>
int main()
{
int b,r,a;
int n;
printf(" \n");
scanf("%d",&n);
for(r=0;r<(n+1)/2;r=r+1){
for(b=0;b<(n+1)/2-r;b=b+1){
printf(" ");
}
for(a=n/2;a<n/2+2*r+1;a=a+1){
printf("*");
}
printf("\n");
}
for(r=0;r<n/2;r=r+1){
for(b=n/2-2;b<n/2+r;b=b+1){
printf(" ");
}
for(a=0;a<n-2*r-2;a=a+1){
printf("*");
}
printf("\n");
}
}
