Format specifier for sscanf() in C Post: 303040623

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Top Forums Programming Format specifier for sscanf() in C Post 303040623 by yifangt on Saturday 2nd of November 2019 08:35:57 AM

11-02-2019

Registered User

Format specifier for sscanf() in C

Hello, I have formatted lines delimited by colon ":", and I need to parse the line into two parts with sscanf() with format specifiers.
infile.txt:

Code:

Sample Name: sample1
SNPs                         : 91
MNPs                         : 1
Insertions                   : 5
Deletions                    : 2
Indels                       : 0
Same as reference            : 1
Missing Genotype             : 44
SNP Transitions/Transversions: 1.74 (73/42)
Total Het/Hom ratio          : 2.96 (74/25)

And here is my code fragment:

Code:

char line[256];     //for row read from file
char name[32];      //1st part (key part) parsed from each line[]
char str1[8];       //2nd part (value part) parsed from each line[]

sscanf(line, "%[^:] : %s", name, str1);      //scan in two halves delimited by ":", in the 2nd half, only take the first part delimited by space/tab
                                             //e.g. line1: Sample Name-> name; sample1 -> str1 
                                             //line10: Total Het/Hom ratio -> name; 2.96-> str1,  discard (74/25)

There may not be space/tab before or after the colon. Ignoring the float/integer data type for numbers at this moment.
For each line I could not get the first half to name, and the first part after ":" into str1. The problem is sscanf() does not stop at the end of each line. Spent some time reading the manpage of sscanf() and my old post, could not figure it out myself.
What is wrong with my sscanf() line? Thanks a lot.

Last edited by yifangt; 11-02-2019 at 01:54 PM.. Reason: typo and add color

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LEARN ABOUT DEBIAN

colorgccrc

COLORGCCRC(5)							File Formats Manual						     COLORGCCRC(5)

NAME

       colorgccrc - configuration file for colorgcc

DESCRIPTION

       A colorgccrc configuration file is used to configure the highlighting of the compiler output from colorgcc.

SYNTAX

       Each  line  consists  of  a  keyword  designating  a configuration variable.  The keyword is followed by `:' and then one or several values
       (depending on the keyword).  Lines beginning with a hash mark `#' are comments.

CONFIGURATION VARIABLES

       g++ | gcc | c++ | cc | g77 | gcj | gnat | gpc
	      Specifies the paths to the compilers.  Takes one value; a path to the compiler.

       nocolor
	      Specifies what terminal types colorization should be disabled on.  Takes one or several values, separated by whitespace.

       srcColor
	      Specifies the highlighting attributes source-code should be given.  Takes one or several color attributes.  See  the  section  COLOR
	      ATTRIBUTES for more information.

       introColor
	      Specifies  the  highlighting  attributes	for normal compiler output.  Takes one or several color attributes.  See the section COLOR
	      ATTRIBUTES for more information.

       warningFileNameColor | errorFileNameColor
	      Specifies the highlighting attributes for the filename in a  warning  or	an  error,  respectively.   Takes  one	or  several  color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

       warningNumberColor | errorNumberColor
	      Specifies  the  highlighting  attributes	for  the  line-number  in a warning or an error, respectively.	Takes one or several color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

       warningMessageColor | errorMessageColor
	      Specifies the highlighting attributes for the message-text in a warning or an error,  respectively.   Takes  one	or  several  color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

COLOR ATTRIBUTES

       The following attributes are valid for highlighting.

       clear, reset

       bold, underline, underscore, blink, reverse, concealed

       black, red, green, yellow, blue, magenta, cyan, white

       on_black, on_red, on_green, on_yellow, on_blue, on_magenta, on_cyan, on_white

SEE ALSO

       gcc(1), colorgcc(1)

HISTORY

       Jan 15 2003: Initial version of this manual-page.

REPORTING BUGS

       Report bugs to <jmoyers@geeks.com>

AUTHORS

       Jamie Moyers <jmoyers@geeks.com> is the author of colorgcc.

       This  manual  page  was	written  by Joe Wreschnig <piman@sacredchao.net>, and modified by David Weinehall <tao@debian.org>, for the Debian
       GNU/Linux system (but may be used by others).

COPYRIGHT

       Copyright (C) 2003 Jamie Moyers
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

								   Jan 15, 2003 						     COLORGCCRC(5)