Hamilton C shell(tm) Samples Directory, Release 2.2.i
Copyright (c) 1989-1993 by Hamilton Laboratories.  All rights reserved.

The sample C programs and C shell scripts in this directory are meant
to help you install or experiment with Hamilton C shell.  Deliberately,
they're relatively trivial.

(All these files should be viewed with TABS=3)
		

args.c         A simple C program that prints out the *argv[] (argument)
					and *envp[] (environmental variable) arrays.  Notice that
					wildcarding, variable substitutions, quoting and command
					substitutions are done before the C program is started.  If
					you do a lot of wildcarding, you can create and pass VERY
					long parameter lists (up 32K characters).  Try some of these
					commands:

						% args "ho"w 'no'w
						% args "$cwd" '$cwd'
						% args * "*" '*'
						% args `whereis more`
						% args '`whereis more`'
						% args * *\* *\*\* | more

bits.csh			A simple self-loading procedure that calculates the minimum
					bits required to represent the argument it's passed as a
					binary integer.

blksize.c      A simple C program that reads from Stdin, copying to Stdout,
					using the specified blocksize.  This program can be useful
					to read or write tape devices that only support certain
					blocksizes.

bumpdate.csh	Print the date n number of days forward or backward from a
					given date.  If only the bump value is given, today's date
					is bumped.

caldate.csh		Print the date corresponding to a given Julian day.

calendar.csh	A C shell script for printing out the calendar for any
					given month, highlighting the current date.  If no date
					is given, this month's calendar is printed.

cl.csh			Run the C compiler and linker for an NT program.  Avoids
					having to fool with a make file just to compile hello, world.
					Works pretty much just like the cl command on DOS would.

colors.csh		Instructions and examples on customizing the screen colors.

deltaday.csh	Print the number of days separating two dates.  If only
					one date is given, the difference between it and today's date
					is returned.

dumpenv.c		This C program writes out the environment it's passed in
					the form of setenv commands.

duplicat.csh	Look for duplicate files anywhere in a directory tree.

easter.csh		A C shell script that calculates when Easter will occur in
					any given year.  If no year is given, the current year is
					assumed.

factor.csh		The simple factor C shell script shown in the User Guide.
					Intended to show examples of recursion, expressions, and
					a self-loading procedure.

finance.csh		Another C shell script showing expression evalution.  This
					defines a number of routines for calculating financial
					conversion factors, e.g., from present to future value.

julian.csh		Calculate the Julian day number (number of days since January 1,
					4713 BC) for any given date.  If you don't give a date, it
					uses today's date.

makecpgm.csh	A simple C shell script showing how a "make" function might
					be written in the C shell language.  This one rebuilds any
					.exe files in the current directory that are older than the
					corresponding .c file or any of the .h files.

mcvisa.csh		A simple C shell script that constructs a special checksum
					of a credit card number to tell if the card number is
					plausible or not.  The checksum used is designed to catch
					transposed or incorrect digits.  Try it on the cards in
					your wallet.

member.csh		Test whether the first argument word appears somewhere in the
					list given by the second argument.

myecho.c			A variation on the builtin echo command that prints its
					*argv[] (argument) list with quotes around each word it's
					passed and tells the total character count.  Try these
					examples:

						% myecho now     is the
						% myecho "now     is" the
						% myecho `ls`
						% myecho `echo`
						% myecho `echo hello`
						% myecho * *\* *\*\* | more

newfiles.csh	List all the files or directories in the current directory
					that do not occur in the specified directory.

postage.csh		Calculate the U.S. first class postage required for a
					given weight in ounces.

rcode.c			A trivial C program that just prints, then exits with the
					return code value you pass it.  You can use this routine to
					see how the status variable is set and also, how the ";",
					"||" and "&&" statement connectors work.  Try these examples:

						% rcode
						% calc status
						% rcode 1
						% calc status
						% echo $status
						% echo status
						% rcode 2
						% calc status
						% rcode 0 || rcode 1
						% rcode 1 || rcode 2
						% rcode 0 && rcode 1
						% rcode 1 && rcode 2
						% rcode 0 ;  rcode 1
						% rcode 1 ;  rcode 2

sh_2_csh.csh	A script for converting Bourne or Korn shell scripts into
					Hamilton C shell scripts using a set of sed scripts contained
					in the sh_2_csh directory.

sizeof.csh		A C shell script that calculates the total disk space used
					by whatever files or directories are given as arguments.
					
ts.csh			A C shell script that searches for occurrences of a simple
					string in all the files with a given extension anywhere in
					a directory tree.

weekday.csh		Print the day of the week corresponding to any given date.

winerror.c		Print the Win32 message corresponding to a given error code.
