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Top Forums Shell Programming and Scripting Reading a single character from each line of the file Post 302479540 by arsii on Saturday 11th of December 2010 08:48:13 AM
Old 12-11-2010
Reading a single character from each line of the file

Hi,

I should read one character at a fixed position from each line of the file. So how ??? should be substituted in the code below:
Code:
while read line ; do
        single_char=`???`
        echo "$single_char"
done < $input_file


Last edited by Scott; 12-11-2010 at 12:40 PM.. Reason: Please use code tags
 

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pack_fgets(3alleg4)						  Allegro manual					       pack_fgets(3alleg4)

NAME
pack_fgets - Reads a line from the stream. Allegro game programming library. SYNOPSIS
#include <allegro.h> char *pack_fgets(char *p, int max, PACKFILE *f); DESCRIPTION
Reads a line from the stream `f', storing it at location pointed to by `p'. Stops when a linefeed is encountered, or `max' bytes have been read. The end of line is handled by detecting the right combination of characters for the platform. This supports CR-LF (DOS/Windows), LF (Unix), and CR (Mac) formats. However, the trailing carriage return is not included in the returned string, in order to provide easy code portability across platforms. If you need the carriage return, use pack_fread() and/or pack_getc() instead. Note: This function internally may make calls to pack_ungetc, so you cannot use pack_ungetc directly afterwards. Example: char buf[256]; ... while (pack_fgets(buf, sizeof(buf), input_file)) { /* Process input line. */ } fclose(input_file); RETURN VALUE
Returns the pointer `p' on success, or NULL on error. SEE ALSO
pack_fopen(3alleg4), pack_fopen_chunk(3alleg4), pack_fread(3alleg4), pack_getc(3alleg4), pack_ungetc(3alleg4) Allegro version 4.4.2 pack_fgets(3alleg4)
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