Write a program that reads an integer value from the user rep-
resenting a year. The purpose of the program is to determine if the year is a leap year (and therefore has 29 days in February) in the Gregorian calendar. A year is a leap year if it is divisible by 4 unless it is also divisible by 100 but not 400. For example, the year 2003 is not a leap year, but 2004 is. The year 1900 is not a leap year because it is divisible by 100, but the year 2000 is a leap year because even though it is divisible by
100, it is also divisible by 400. Produce an error message for
any input value less than 1582 (the year the Gregorian calendar
was adopted).
Modify the solution to the previous project so that the user can
evaluate multiple years. Allow the user to terminate the program
using an appropriate sentinel value. Validate each input value to
ensure it is greater than or equal to 1582.
Write a program that plays the Hi-Lo guessing game with
numbers. The program should pick a random number between
1 and 100 (inclusive), then repeatedly prompt the user to guess
the number. On each guess, report to the user that he or she
is correct or that the guess is high or low. Continue accepting
guesses until the user guesses correctly or chooses to quit. Use
a sentinel value to determine whether the user wants to quit.
Count the number of guesses and report that value when the user guesses correctly. At the end of each game (by quitting or a correct guess), prompt to determine whether the user wants to play again. Continue playing games until the user chooses to stop.
Write a program that plays the Rock-Paper-Scissors game against
the computer. When played between two people, each person
picks one of three options (usually shown by a hand gesture) at
the same time, and a winner is determined. In the game, Rock
beats Scissors, Scissors beats Paper, and Paper beats Rock. The
program should randomly choose one of the three options (with-
out revealing it), then prompt for the user's selection. At that point, the program reveals both choices and prints a statement indicating if the user won, the computer won, or if it was a tie. Continue playing until the user chooses to stop, then print the
number of user wins, losses, and ties.