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  1. #include <iostream>
  2. #include <regex>
  3. #include <set>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8. 	const auto input = "av*sin_(w*t)+a+b/c+x^2+w3_so^2/2"s;
  9. 	const regex re{ "\\b([a-zA-Z]\\w*)(?:[^(a-zA-Z0-9_]|$)" };
  10. 	const set<string> output{ sregex_token_iterator(cbegin(input), cend(input), re, 1), sregex_token_iterator() };
  11.  
  12. 	for(const auto& i : output) cout << i << endl;
  13. }
Success #stdin #stdout 0s 3560KB
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stdin
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Standard input is empty
stdout
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a
av
b
c
t
w
w3_so
x
https://ideone.com/OLkpJM
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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