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//less Efficient code scroll for alternative

#include <stdio.h>

void main()

{

  int year;

  printf("Enter a year to check if it is a leap year\n");

  scanf("%d", &year);

  if ( year%400 == 0)

    printf("%d is a leap year.\n", year);

  else if ( year%100 == 0)

    printf("%d is not a leap year.\n", year);

  else if ( year%4 == 0 )

    printf("%d is a leap year.\n", year);

  else

    printf("%d is not a leap year.\n", year);

  getch();

}

#include <stdio.h>

void main()

{

  int year;

  printf("Enter a year to check if it is a leap year\n");

  scanf("%d", &year);

if ((year & 3) == 0 && ((year % 25) != 0 || (year & 15) == 0))

{

    printf("%d is a leap year.\n", year);

}

  else

    printf("%d is not a leap year.\n", year);

  getch();

}