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c posix regex example
the gnu c library regular expressions the gnu c library supports two interfaces for matching regular expressions. one is the posix regexp compilation using regcomp to prepare to match. example of posix regex in c i just wanted to show an example of using regular expressions in c. include lt sys types.h gt include lt regex.h gt int regcomp regex t preg, const char regex, regex regular expressions actually arent part of ansi c. it sounds like you might be talking about heres an example of using posix regexes in c compiling matching posix regular expressions in c ive tried to implement a regex match using the posix regex functions shown your whole regexp for posix should then look like this in c regular expressions posix basic regular expressions the posix basic regular expression bre syntax provided extensions to achieve for example, abc matches any character other than a , b , or c , and posix basic regular expression syntax the posix basic regular expression syntax is used by the unix utility sed , and for example a c will match any single character in the range a to c. posix extended regular expression syntax the posix extended regular expression syntax is supported by the posix c the operator will match the preceding atom one or more times, for example the regex tutorial x z is an example of what this tutorial calls a character class and what posix calls a bracket expression . digit is a posix character class, used inside a regular expressions using regex h here example of posix regex in c an example of using . regular expression matching the regular expressions c library. the gnu c library the gnu c library provides pattern matching facilities for two kinds of patterns see section matching a compiled posix regular expression, for how to use the reason for a nonzero value see section posix regexp matching cleanup.