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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <string>
  4. #include <locale>
  5.  
  6. int main() {
  7.  
  8.     using namespace std;
  9.     using namespace std::placeholders;
  10.  
  11.     typedef std::string String;
  12.     typedef String::value_type char_type;
  13.  
  14.     String input = "how are you";
  15.     locale default_locale;
  16.  
  17.     auto is_graph = bind( isgraph<char_type>, _1, cref(default_locale) );
  18.     auto is_digit = bind( isspace<char_type>, _1, cref(default_locale) );
  19.  
  20.     for( String::iterator rev_begin = input.begin(), rev_end;
  21.          rev_begin != input.end(); rev_begin = rev_end ) {
  22.  
  23.         rev_begin = find_if( rev_begin, input.end(), is_graph );
  24.         rev_end = find_if( rev_begin, input.end(), is_digit );
  25.  
  26.         if( rev_begin == input.end() )
  27.             break;
  28.  
  29.         reverse( rev_begin, rev_end );
  30.     }
  31.  
  32.     cout << input << endl;
  33. }
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stdout 
Standard output is empty
https://ideone.com/1shWFG
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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