C語言實現一個函數判斷year是不是閏年

C語言實現一個函數判斷year是不是閏年

#include <stdio.h>
int main()
{
 int leap_year(int year);
 int year;
 printf("please enter year:");
 scanf("%d",&year);
 leap_year(year);
 return 0;
}
int leap_year(int year)
{
 if((year%400==0)||((year%4==0)&&(year%100!=0)))
  printf("leap year\n");
 else
  printf("not leap year\n");
}