COS 100: Introduction to Programming

Fall 2019

Lab 6: Extra practice

This is an outside-of-class bonus lab to help you prepare for the upcoming exam.

Lab 6A: I am leaping

• Task: Prompt the user for a starting year and an ending year, then print out all the leap years in between (inclusive).
• Years divisible by 4 are leap years (e.g., 2004, 2008, 2012, 2016, 2020).
• Sample run:

  Start year? 1997
  End year? 2012
  2000
  2004
  2008
  2012
  

• Actually, that's too many leap years. You'll fix this in Lab 6C.

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Lab 6B: I am waiting

• Ask the user to enter in the current time and a number of minutes to wait.
• Print out the time when the user is done waiting.
• Sample run:

  Current hour: 10
  Current minute: 23
  Current am/pm: am
  Wait for how many minutes: 123
  Current time is 10:23 am; 123 minutes later is 12:26 pm.
  

• Can you handle wait time given as hours and minutes?

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Challenge Lab 6C: Leaping more accurately

• Modify Lab 6A as follows.
• Years divisible by 100 are not leap years (e.g., 2100, 2200, 2300), except years divisible by 400 are leap years (e.g., 1600, 2000, 2400).
• Sample run:

  Start year? 2095
  End year? 2105
  2096
  2104
  

• Can you output in a single line with proper grammar (complete with the Oxford comma)?
• Sample runs:

  Start year? 1997
  End year? 2012
  2000, 2004, 2008, and 2012.
  
  Start year? 2095
  End year? 2105
  2096 and 2104.