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  1. #include <algorithm>
  2. #include <iostream>
  3. #include <string>
  4.  
  5. class both_equal_to
  6. {
  7.     char value;
  8. public:
  9.     both_equal_to(char ch) : value(ch) {}
  10.  
  11.     bool operator()(char first, char second) const
  12.     {
  13.         return (first == second) && (first == value);
  14.     }
  15. };
  16.  
  17. int main()
  18. {
  19.     std::string text("_hello___world__");
  20.  
  21.     text.erase(
  22.         std::unique(
  23.             text.begin(),
  24.             text.end(),
  25.             both_equal_to('_')
  26.             // [](char a, char b){ return (a == '_') && (b == '_'); }
  27.         ),
  28.         text.end()
  29.     );
  30.  
  31.     std::cout << text << '\n';
  32.  
  33.     return 0;
  34. }
  35.  
Success #stdin #stdout 0.01s 2856KB
comments (?)
stdin 
Standard input is empty
stdout 
_hello_world_
https://ideone.com/qJ9x9
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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