Format specifier for sscanf() in C


 
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Old 11-02-2019
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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