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  1. #include <iostream>
  2. #include <string>
  3.  
  4. std::string middleCharacters(const std::string &str)
  5. {
  6. 	if (str.length() <= 0) return "";
  7. 	return str.substr((str.length() - 1) / 2, 2 - str.length() % 2);
  8. }
  9.  
  10. int main()
  11. {
  12. 	std::cout << middleCharacters("ababa") << std::endl;
  13. 	std::cout << middleCharacters("abavba") << std::endl;
  14. 	std::cout << middleCharacters("a") << std::endl;
  15. 	std::cout << middleCharacters("") << std::endl;
  16. }
  17.  
Success #stdin #stdout 0.01s 2860KB
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stdin
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Standard input is empty
stdout
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a
av
a
https://ideone.com/vId2l
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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