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Full Discussion: Csh arithmetic not producing the expected value
Top Forums Shell Programming and Scripting Csh arithmetic not producing the expected value Post 302882024 by sgualandri on Friday 3rd of January 2014 03:47:51 PM
Old 01-03-2014
Csh arithmetic not producing the expected value
My original post did not show up properly. I am trying again.
I have a simple tsch script that does some basic arithmetic. The calculated value was not producing the result I was expecting. I wrote a sample script to illustrate the things that I tried.

Code:
#!/bin/tcsh
@ count = 43
@ total_count = 61
@ failing = 4
@ no_finish = 0
echo "Total Count:$total_count  Finished:$count  Failed:$failing  $total_count-$count-$failing"
@ no_finish   = $total_count - $count - $failing 
echo $no_finish
echo "Total Count:$total_count  Finished:$count  Failed:$failing  $total_count-$count-$failing"
@ no_finish  = $total_count - ( $count + $failing )
echo $no_finish
echo "Total Count:$total_count  Finished:$count  Failed:$failing  $total_count-$count-$failing"
@ no_finish  = ( $total_count - $count - $failing )
echo $no_finish
echo "Total Count:$total_count  Finished:$count  Failed:$failing  $total_count-$count-$failing"
@ no_finish  = ( $total_count - $count ) - $failing 
echo $no_finish

script output

Total Count:61 Finished:43 Failed:4 61-43-4
22
Total Count:61 Finished:43 Failed:4 61-43-4
14
Total Count:61 Finished:43 Failed:4 61-43-4
22
Total Count:61 Finished:43 Failed:4 61-43-4
14


Last edited by sgualandri; 01-03-2014 at 04:52 PM.. Reason: original text did not show up
 

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LEARN ABOUT V7

pnmarith

pnmarith(1)                                                   General Commands Manual                                                  pnmarith(1)

NAME

       pnmarith - perform arithmetic on two portable anymaps

SYNOPSIS

       pnmarith -add|-subtract|-multiply|-difference|-minimum|-maximum.  pnmfile1 pnmfile2

DESCRIPTION

       Reads two portable anymaps as input.  Performs the specified arithmetic operation, and produces a portable anymap as output.  The two input
       anymaps must be the same width and height.

       The arithmetic is performed between corresponding pixels in the two anymaps, as if maxval was 1.0, black was 0.0, and  a  linear  scale  in
       between.  Results that fall outside of [0..1) are truncated.

       The operator -difference calculates the absolute value of pnmarith -subtract pnmfile1 pnmfile2, i.e. no truncation is done.

       All flags can be abbreviated to their shortest unique prefix.

SEE ALSO

       pbmmask(1), pnmpaste(1), pnminvert(1), pnm(5)

AUTHOR

       Copyright (C) 1989, 1991 by Jef Poskanzer.  Lightly modified by Marcel Wijkstra <wijkstra@fwi.uva.nl>

                                                                  26 August 1993                                                       pnmarith(1)
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