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  1. #include <iostream>
  2. #include <string>
  3.  
  4. std::string getValue(const std::string &html)
  5. {
  6. 	static const std::string VALUE = "value";
  7. 	static const char DOUBLE_QUOTE = '"';
  8.  
  9. 	std::string result;
  10.  
  11. 	std::size_t pos = html.find(VALUE);
  12. 	if (pos != std::string::npos)
  13. 	{
  14. 		std::size_t beg = html.find_first_of(DOUBLE_QUOTE, pos);
  15.  
  16. 		if (beg != std::string::npos)
  17. 		{
  18. 			std::size_t end = html.find_first_of(DOUBLE_QUOTE, beg + 1);
  19.  
  20. 			if (end != std::string::npos)
  21. 			{
  22. 				result = html.substr(beg + 1, end - beg - 1);
  23. 			}
  24. 		}
  25. 	}
  26.  
  27. 	return result;
  28. }
  29.  
  30. int main()
  31. {
  32. 	std::string html = "<input type=\"hidden\" name=\"wtkn\" value=\"56e45dbe_wNIT/DcufUPvZOL33jmkyqGpKxw=\">";
  33. 	std::cout << "HTML: " << html << "\n";
  34. 	std::cout << "value: " << getValue(html) << "\n";
  35. 	return 0;
  36. }
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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HTML: <input type="hidden" name="wtkn" value="56e45dbe_wNIT/DcufUPvZOL33jmkyqGpKxw=">
value: 56e45dbe_wNIT/DcufUPvZOL33jmkyqGpKxw=
https://ideone.com/2ujMcm
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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