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  1. #include <iostream>
  2. #include <string>
  3. #include <cctype>
  4. #include <cstring>
  5. #include <set>
  6. #include <sstream>
  7.  
  8. std::string tolower( std::string str )
  9. { for( char& c : str ) c = std::tolower(c) ; return str ; }
  10.  
  11. std::string remove_punct( const std::string& str )
  12. {
  13.     std::string result ;
  14.     for( char c : str ) if( !std::ispunct(c) ) result += c ;
  15.     return result ;
  16. }
  17.  
  18. std::string capitalise( std::string str )
  19. { if( !str.empty() ) str[0] = std::toupper( str[0] ) ; return str ; }
  20.  
  21. // http://w...content-available-to-author-only...s.com/reference/set/set/
  22. char* convert_to_title_case( char* title, const std::set<std::string>& nocap_words )
  23. {
  24.     std::string converted_title ;
  25.  
  26.     // http://w...content-available-to-author-only...s.com/reference/sstream/istringstream/
  27.     std::istringstream stm(title) ;
  28.     std::string word ;
  29.     while( stm >> word ) // for each word in the title
  30.     {
  31.         word = tolower(word) ;
  32.         if( !converted_title.empty() ) converted_title += ' ' ;
  33.  
  34.         // capitalise it if it is not in the nocap_words set
  35.         // http://w...content-available-to-author-only...s.com/reference/set/set/find/
  36.         if( nocap_words.find( remove_punct(word) ) == nocap_words.end() )
  37.             word = capitalise(word) ;
  38.  
  39.         converted_title += word ;
  40.     }
  41.  
  42.     // copy converted_title back into the c-style string and return
  43.     return std::strcpy( title, converted_title.c_str() ) ;
  44. }
  45.  
  46. std::set<std::string> get_words( std::istream& stm )
  47. {
  48.     std::set<std::string> result ;
  49.     std::string w ;
  50.     while( stm >> w ) result.insert(w) ;
  51.     return result ;
  52. }
  53.  
  54. int main()
  55. {
  56.     std::istringstream minors( "a an for of the" ) ; // std::ifstream over "minors.txt"
  57.     const auto nocap_words = get_words( minors ) ;
  58.  
  59.     char test[] [100] = { "a brief hisTOry OF everyTHING", "A Universal HisTOry Of infamy",
  60.                            "The; history, of: punctuations!", "1024: FOR A history Of NUMBERS" } ;
  61.     for( char* title : test )
  62.     {
  63.         std::cout << title << " => " ;
  64.         std::cout << convert_to_title_case( title, nocap_words ) << '\n' ;
  65.     }
  66. }
  67.  
Success #stdin #stdout 0s 3480KB
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stdin
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Standard input is empty
stdout
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a brief hisTOry OF everyTHING => a Brief History of Everything
A Universal HisTOry Of infamy => a Universal History of Infamy
The; history, of: punctuations! => the; History, of: Punctuations!
1024: FOR A history Of NUMBERS => 1024: for a History of Numbers
https://ideone.com/b53tid
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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