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Top Forums Shell Programming and Scripting printf in bash shell not printing negative values Post 302276807 by npatwardhan on Wednesday 14th of January 2009 03:51:59 PM
Old 01-14-2009
printf in bash shell not printing negative values

hi i am using printf in a script and it is not printing negative values..i have to use printf to get rid of the newline..here is my code:

Code:
fin[i]=`echo $a - $b | bc`
printf "${fin[i]}," >> test

these statements are in a loop. here is what i get when i try to subtract 4 from 8:
Code:
./scr1: line 58: printf: -4: invalid option
printf: usage: printf [-v var] format [arguments]
./scr1: line 58: printf: -4: invalid option
printf: usage: printf [-v var] format [arguments]
./scr1: line 58: printf: -4: invalid option
printf: usage: printf [-v var] format [arguments]
./scr1: line 58: printf: -4: invalid option
printf: usage: printf [-v var] format [arguments]
./scr1: line 58: printf: -4: invalid option
printf: usage: printf [-v var] format [arguments]

what can i do to get rid of this error?
 

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explain_printf_or_die(3)				     Library Functions Manual					  explain_printf_or_die(3)

NAME
explain_printf_or_die - formatted output conversion and report errors SYNOPSIS
#include <libexplain/printf.h> int explain_printf_or_die(const char *format); int explain_printf_on_error(const char *format); DESCRIPTION
The explain_printf_or_die function is used to call the printf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_printf(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_printf_on_error function is used to call the printf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_printf(3) function, but still returns to the caller. format The format, exactly as to be passed to the printf(3) system call. RETURN VALUE
The explain_printf_or_die function only returns on success, see printf(3) for more information. On failure, prints an explanation and exits, it does not return. The explain_printf_on_error function always returns the value return by the wrapped printf(3) system call. EXAMPLE
The explain_printf_or_die function is intended to be used in a fashion similar to the following example: int result = explain_printf_or_die(format); SEE ALSO
printf(3) formatted output conversion explain_printf(3) explain printf(3) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2010 Peter Miller explain_printf_or_die(3)
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