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Full Discussion: Read numbers from file
Top Forums Shell Programming and Scripting Read numbers from file Post 302805451 by Don Cragun on Friday 10th of May 2013 05:49:45 AM
Old 05-10-2013
Quote:
Originally Posted by vish6251
I am trying to make a script to read marks from a file then find out how many of them are above 40 (passing marks). However my script is getting stuck at "read num". I dont understand whats the problem. Any help will be much appreciated.

Code:
#!/bin/bash
set -x
count=0; countP=0;  PASSMK=40
max=-1;  min=999999
tot=0;   avg=0

read num #read the first input number
while [ $num -ge 0 ]; do
  tot=$(($tot+$num))
  if [ $num -gt $max ]; then
    max=$num
  fi
  if [ $num -lt $min ]; then
    min=$num
  fi

  count=$(($count+1))
  if [ $num -ge $PASSMK ]; then
    countP=$(($countP+1));
  fi

  read num #read the next input number
done

if [ $count -gt 0 ]; then
  avg=$(($tot/$count))
fi
printf "entries\tpasses\tmax\tmin\tavg\n"
printf "%d\t%d\t%d\t%d\t%d\n" "$count" "$countP" "$max" "$min" "$avg"

You said you want the read commands to read from a file, but you haven't specified any file. Therefore, both read commands will read from the standard input for your bash script. In other words, the script is waiting for you to type in values to be processed.

If you want to choose a different file each time you run the script, you can redirect the input of your script when you run it, as in:
Code:
script_name < input_file

If you always want the read command in your script to read from the same file every time you run the script, change the line marked in red in your script above with:
Code:
done < input_file

This User Gave Thanks to Don Cragun For This Post:
vish6251
 

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LEARN ABOUT DEBIAN

fribidi_set_reorder_nsm

fribidi_set_reorder_nsm(3)					Programmer's Manual					fribidi_set_reorder_nsm(3)

NAME

       fribidi_set_reorder_nsm - set marks reordering on or off

SYNOPSIS

       #include <fribidi.h>

       fribidi_boolean fribidi_set_reorder_nsm(fribidi_boolean state);

PARAMETERS

       fribidi_boolean state
	      New state to set.

DESCRIPTION

       This function is used to turn non-spacing marks reordering on or off.  Reordering non-spacing marks is the act of placing non-spacing marks
       (bidi class NSM) after their base character in a right-to-left resolved context.  If your rendering engine expects non-spacing marks always
       after  the  base character in the memory representation of the visual string, you need this option on.  An example of where people may need
       it off is when rendering in the console when non-spacing marks cannot be applied on top of the base character.

       This flag is on by default.  This function is deprecated and only used with other deprecated functions.

RETURNS

       The new marks reordering status.

SEE ALSO

       fribidi_charset_to_unicode(3),  fribidi_unicode_to_charset(3),  fribidi_parse_charset(3),  fribidi_shape_arabic(3),  fribidi_get_par_direc-
       tion(3),     fribidi_get_par_embedding_levels(3),     fribidi_reorder_line(3),	  fribidi_get_bidi_type(3),	fribidi_get_bidi_types(3),
       fribidi_get_bidi_type_name(3),  fribidi_debug_status(3),  fribidi_mirroring_status(3),  fribidi_set_mirroring(3),  fribidi_reorder_nsm_sta-
       tus(3),	  fribidi_log2vis_get_embedding_levels(3),    fribidi_get_type(3),   fribidi_get_type_internal(3),   fribidi_remove_bidi_marks(3),
       fribidi_log2vis(3), fribidi_join_arabic(3),  fribidi_get_joining_type(3),  fribidi_get_joining_types(3),  fribidi_get_joining_type_name(3),
       fribidi_get_mirror_char(3), fribidi_shape_mirroring(3), fribidi_shape(3)

GNU FriBidi 0.19.2						  30 January 2006					fribidi_set_reorder_nsm(3)
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