CSci 3102  Extension  Winter 1994
Lab 2
Due: 31 January


     Write a program that will print a calendar for a month.

The user will be prompted to input a month as an integer from 1 to 12
and the day of the week that the month starts on as an integer from 0
to 6 or from 1 to 7, whichever you want.  The program should accept
only valid values as input (ie. it must error-check the user's input
and loop until legitimate values have been input).

The program will then display the name of the month, column headings
for the days of the week, a straight line beneath that, and then the
days of the month under the correct columns.  The program will
continue to display monthly calendars until the user tells it no more.

The main program will be a short loop controlled by the user's answer
to whether another month should be displayed.  At least one month
should be displayed though.  The body of the loop will consist of
procedure calls.

One procedure will prompt for and input a valid month and a valid
number indicating the day the month starts on.  Another procedure will
return the number of days in the month.  Another procedure will
display the month's name and the column headings.  Another procedure
will print the days of the month.  Another procedure will query the
user if another month's calendar should be displayed.

Design the main program first.  Choose good names for the procedures.
Specify the input and output parameters for each procedure.  Then
design the procedure bodies.

The program must be thoroughly documented and exhibit good programming
style.