Regex is the short form for “Regular expression”, which is often used in this way in programming languages and many different libraries. It is supported in C++11 onward compilers.
regex_match() -This function return true if the regular expression is a match against the given string otherwise it returns false.
String 'a' matches regular expression 'b' String 'a' matches with regular expression 'b' in the range from 0 to string end
regex_search() – This function is used to search for a pattern matching the regular expression
regex_replace() This function is used to replace the pattern matching to the regular expression with a string.
I am looking for geek I am looking for geek
So Regex operations make use of following parameters :-
- Target sequence (subject) – The string to be matched.
- Regular Expression (Pattern) – The regular expression for the target sequence.
- Matched Array – The information about matches is stored in a special match_result array.
- Replacement String – These string are used for allowing replacement of the matches.
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