Write a c program to print a Diamond pattern-12

#include<stdio.h>
int main()
{
int i,j,k=0,num,n;
printf("Enter no of rows\n");
scanf("%d",&num);
n=(num+1)/2;
for(i=1;i<=num;i++)
{
i<=n?k++:k--;
for(j=1;j<=num;j++)
{
if(j>=n+1-k && j<=n-1+k)
{
printf("*");
}
else
{
printf(" ");
}
}
printf("\n");
}
return 0;
}