Leap years. Write a functionbool leap_year(int year)that tests whether a year is a leap

Chapter 5, Problem P5.21

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Leap years. Write a functionbool leap_year(int year)that tests whether a year is a leap year: that is, a year with366 days. Leap years are necessary to keep the calendarsynchronized with the sun because the earth revolvesaround the sun once every 365.25 days. Actually, thatfigure is not entirely precise, and for all dates after 1582 theGregorian correction applies. Usu ally years that are divisible by 4 are leap years, forexample 1996. However, years that are divisible by 100 (for example, 1900) are notleap years, but years that are divisible by 400 are leap years (for example, 2000).