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  1. #include <string>
  2. #include <iostream>
  3. namespace std{
  4. class A: public std::string 
  5. {
  6. public:
  7. 	A(std::string const &r): std::string(r){}
  8. 	std::string left(long n)
  9. 	{
  10. 		return std::string(begin(), begin() +n);
  11. 	}
  12. };
  13. }
  14. #define string A
  15. int main()
  16. {
  17. 	std::string str("abc");
  18. 	std::string str2 = str.left(2);
  19. 	std::cout << str2;
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 3468KB
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https://ideone.com/dnjbwj
language:
C++14 (clang 8.0)
created:
7 years ago
visibility:
public

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