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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. bool ends_with(std::string const & str, std::string const & suffix)
  6. {
  7.     // If the string is smaller than the suffix then there is no match.
  8.     if (str.size() < suffix.size()) { return false; }
  9.  
  10.     return 0 == str.compare(str.size() - suffix.size(),
  11.                             suffix.size(),
  12.                             suffix,
  13.                             0,
  14.                             suffix.size());
  15. }
  16.  
  17. void ensure_ends_with_txt(std::string & str)
  18. {
  19. 	if (!ends_with(str, ".txt")) {
  20. 		str += ".txt";
  21. 	}
  22. }
  23.  
  24. int main() {
  25. 	std::vector<std::string> tests = {
  26. 		"a.txt",
  27. 		"b.txt.zip",
  28. 		"c"
  29. 	};
  30.  
  31. 	for (auto i = tests.begin(); i != tests.end(); ++i) {
  32. 		std::cout << *i << " --> ";
  33. 		ensure_ends_with_txt(*i);
  34. 		std::cout << *i << std::endl;
  35. 	}
  36.  
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 3480KB
comments (?)
stdin
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Standard input is empty
stdout
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a.txt --> a.txt
b.txt.zip --> b.txt.zip.txt
c --> c.txt
https://ideone.com/SYKU0C
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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