Checking weather a year is leap year or not

Problem Statement
check weather a .year is leap year or not
#include<stdio.h>
int main()
{
  int year;
  printf("enter the year \n");
  scanf("%d",&year);
  if(year%100==0)
    {
      if(year%400==0)
{
 printf("this is a leap year \n");
}
      else
{
 printf("this is not a leap year \n");
}
    }
  else
    {
      if(year%4==0)
{
 printf("this is a leap year \n");
}
      else
{
 printf("this is not a leap year \n");
}
    }
  return 0;
}