Demonstrate how to time an event.

% event_timer_demo --help  

# The "--help" flag gives an example.  

event_timer_demo:
 Script to demonstarte how I use routine "dspit" and "dsep" 
to time an event (like the time to run a code). 

Usage: event_timer_demo N  
arg1 - run in debug mode (Y/N)
NOTE: Only good to integer seconds 

EXAMPLE: 
% event_timer_demo N
a 1  Thu Sep 27 16:08:35 UTC 2018

You can wait for some time interval. 
After you hit a return, that time interval will be measured and reported. 
Enter any key to continue:
a 2  Thu Sep 27 16:09:05 UTC 2018


	Time interval = 30.000000 seconds 


Here is the full script
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#!/bin/bash

# Check command line arguments 
if [ -z "$1" ]
then
 printf "Usage: event_timer_demo N  \n"
 printf "arg1 - run in debug mode (Y/N)\n"
 printf "NOTE: Only good to integer seconds \n"
 exit
fi
if [ $1 = "--help" ]
then
 show_help event_timer_demo 
 exit
fi

# rename arguments 
debug="$1"

if [ $debug = "Y" ]
then 
 printf "Debug flag is ON in event_timer_demo. \n"
fi 

dspit a 1
dsep tstamp.a_1 > Time.Start 

printf "\nYou can wait for some time interval. \n"
printf "After you hit a return, that time interval will be measured and reported. \n"
message_and_read s

dspit a 2
dsep tstamp.a_2 > Time.End

read t1 < Time.Start
read t2 < Time.End
fpmath.sh $t2 - $t1 > junk.100
read time < junk.100

printf "\n\n\tTime interval = $time seconds \n" 

if [ $debug = "Y" ] 
then 
 exit 
fi 

# make a last clean up
\rm -f dsep.out junk.100 pars.in Time.End Time.Start tstamp.a_1 tstamp.a_2

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