Determine whether a given year is a leap year in the Gregorian calendar.

#include <iostream> bool is_leap_year(int year) { return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0); } int main() { for (auto year : {1900, 1994, 1996, 1997, 2000}) { std::cout << year << (is_leap_year(year) ? " is" : " is not") << " a leap year.\n"; } }

- Output:

1900 is not a leap year. 1994 is not a leap year. 1996 is a leap year. 1997 is not a leap year. 2000 is a leap year.

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