Century and leap year

Question

Cheak the enter year is leap year and century year

Answer 1

#include <stdio.h>
 
int main(int argc , char *argv[])
{
  int year;
  year=atoi(argv[1]);
  if ( year%400 == 0)
    printf("\n\n\t\t\t\t\t%d is a leap year.", year);
  else if ( year%100 == 0)
    printf("\n\n\t\t\t\t\t%d isn't a leap year.", year);
  else if ( year%4 == 0 )
    printf("\n\n\t\t\t\t\t%d is a leap year.", year);
  else
    printf("\n\n\t\t\t\t\t%d isn't a leap year.", year);  
  return 0;
}

Answer 2

#include <stdio.h>

int main()

{

int year;

printf("Please insert a year: ");
    scanf("%i",&year);
    if (year% 4)
    {
        printf("No leap year");
    } else
      if (year% 100 == 0)
        printf("No leap year!");
      else
      printf("Leap year!");

return(0);

}