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  1. /// Вариант 1.
  2.  
  3. #include <iostream>
  4. #include <string>
  5. #include <cctype>
  6.  
  7. void strToUpper(std::string& str);
  8.  
  9. int main()
  10. {
  11.     std::string i = "Don't WORRY be HAPPY.";
  12.     strToUpper(i);
  13.  
  14.     return 0;
  15. }
  16.  
  17. void strToUpper(std::string& str)
  18. {
  19.     for (auto c : str)
  20.     {
  21.         c = toupper(c);
  22.         std::cout << c;
  23.     }
  24. }
Success #stdin #stdout 0s 3476KB
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DON'T WORRY BE HAPPY.
https://ideone.com/Hsfck9
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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