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

mencal

mencal(1)								 1								 mencal(1)

NAME

       mencal - menstruation calendar

SYNOPSIS

       mencal [options] [file1 file2 ... -c CONF1 -c CONF2 ...]

DESCRIPTION

   Display options:
       -m, --monday
	      draw monday as first weekday (sunday is default)

       -1     current month (default)

       -3     previous, current and next month

       -y [YYYY]
	      all-year calendar (default YYYY is current year)

       -q, --quiet
	      no top information will be printed

       -n, --nocolor
	      noncolored output

       -i, --icolor COLOR
	      intersection color (default red)

	      available colors: red, green, blue, yellow, violet, cyan, shiny, bold

   mencal configuration:
       -c, --config
	      s=[YYYY]MMDD,l=LL,d=DD,n=NAME,f=FILE,c=COLOR

	      The  second argument is a comma separated list of options. No spaces are allowed in this list. If no name is specified, 'Unknown' is
	      used.  Various -c options or filenames can be set.

       s,start=[YYYY]MMDD
	      start day of period (default current day)

       l,length=LL
	      length of period in days (default 28)

       d,duration=D
	      duration of menstruation in days (default 4)

       n,name=NAME
	      name of subject

       f,file=FILE
	      filename to save configuration to (see section FILES)

	      only menstruation related variables will be saved

       c,color=COLOR
	      color used for menstruation days

	      available colors: red, green, blue, yellow, violet, cyan, shiny, bold default color is red, with	'-n'  switch  color  settings  are
	      ignored

   Info options:
       -h, --help
	      print help

       -V, --version
	      print version information

FILES
:
       $HOME/.mencalrc - the default configuration file that is automatically loaded

AUTHOR
:
       (C) 2002 C. McCohy
       e-mail: <mccohy@kyberdigi.cz>
       Word-Wide-Web: http://www.kyberdigi.cz/projects/mencal/english

       This  manual  page  was	written for the Debian GNU/Linux distribution because the original program does not have a manual page (but may be
       used by others).

HISTORY

       22 March 2002 - Originally written by Amaya Rodrigo <amaya@debian.org>.
       24 Apr 2002 - New manpage contributed by Pablo S. Torralba <psanchez@skyrealms.org>.
       Amaya Rodrigo <amaya@debian.org> is now responsible for developing and maintaining this manual page. Comments and suggestions  are  greatly
       wellcome.

mencal							       Menstruation calendar							 mencal(1)