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  1. #include <iostream>
  2. #include <string>
  3. #include <cctype>
  4.  
  5. std::string word_wrap(std::string text, unsigned per_line)
  6. {
  7.     unsigned line_begin = 0;
  8.  
  9.     while (line_begin < text.size())
  10.     {
  11.         const unsigned ideal_end = line_begin + per_line ;
  12.         unsigned line_end = ideal_end <= text.size() ? ideal_end : text.size()-1;
  13.  
  14.         if (line_end == text.size() - 1)
  15.             ++line_end;
  16.         else if (std::isspace(text[line_end]))
  17.         {
  18.             text[line_end] = '\n';
  19.             ++line_end;
  20.         }
  21.         else    // backtrack
  22.         {
  23.             unsigned end = line_end;
  24.             while ( end > line_begin && !std::isspace(text[end]))
  25.                 --end;
  26.  
  27.             if (end != line_begin)                  
  28.             {                                       
  29.                 line_end = end;                     
  30.                 text[line_end++] = '\n';            
  31.             }                                       
  32.             else                                    
  33.                 text.insert(line_end++, 1, '\n');
  34.         }
  35.  
  36.         line_begin = line_end;
  37.     }
  38.  
  39.     return text;
  40. }
  41.  
  42. int main()
  43. {
  44.     std::string player_name = "Eric";
  45.     std::string age = "152";
  46.     std::string gender = "transgender";
  47.  
  48.     enum body_type { fit, unfit };
  49.     body_type body = fit;
  50.  
  51.     std::string working_text = "Your name is " + player_name + " and you're " + age + " years old. You're a " + gender + " and your body type is ";
  52.  
  53.     std::cout << word_wrap(working_text, 10) << "\n\n" ;
  54.     std::cout << word_wrap(working_text + (body == fit ? "burly and strong." : "fat and blubbery."), 10) << '\n';
  55. }
Success #stdin #stdout 0s 3432KB
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stdin
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Standard input is empty
stdout
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Your name
is Eric
and you're
152 years
old.
You're a
transgende
r and your
body type
is 

Your name
is Eric
and you're
152 years
old.
You're a
transgende
r and your
body type
is burly
and strong.
https://ideone.com/wai9da
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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