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Top Forums Programming Format specifier for sscanf() in C Post 303040848 by MadeInGermany on Thursday 7th of November 2019 04:29:33 PM
Old 11-07-2019
The empty line prints str1.
Because it was not matched in scanf() it has the value from the previous line - therefore the str1= assignment,
should set it to "" with one of
str1[0]=0 or str1[0]='\0' or with a bit more overhead strcpy(str1, "").
But you have str1[0]='0' that overwrites the first character of the previous value with a 0 character.
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streqvcmp(3)							Programmer's Manual						      streqvcmp(3)

NAME
streqvcmp - compare two strings with an equivalence mapping SYNOPSIS
#include <your-opts.h> cc [...] -o outfile infile.c -lopts [...] int streqvcmp(char const* str1, char const* str2); DESCRIPTION
Using a character mapping, two strings are compared for "equivalence". Each input character is mapped to a comparison character and the mapped-to characters are compared for the two NUL terminated input strings. This function name is mapped to option_streqvcmp so as to not conflict with the POSIX name space. str1 first string str2 second string RETURN VALUE
the difference between two differing characters ERRORS
none checked. Caller responsible for seg faults. SEE ALSO
The info documentation for the -lopts library. ao_string_tokenize(3), configFileLoad(3), optionFileLoad(3), optionFindNextValue(3), optionFindValue(3), optionFree(3), optionGetValue(3), optionLoadLine(3), optionNextValue(3), optionOnlyUsage(3), optionProcess(3), optionRestore(3), optionSaveFile(3), optionSaveState(3), optionUnloadNested(3), optionVersion(3), pathfind(3), strequate(3), streqvmap(3), strneqvcmp(3), strtransform(3), 2011-07-10 streqvcmp(3)
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