///////////////////////////////////////////////////////////////////
// caser.cpp - Solution of MT#3-Q8                             //
//                                                               //
// This is a demo showing how to convert a string reference to   //
// upper case characters.                                        //
///////////////////////////////////////////////////////////////////

#include <string>
#include <iostream>

typedef std::string str;

class caser
{
public:
  caser(str &change) : _cased(change) {}
  void up()
  {
    for(unsigned i=0; i<_cased.length(); ++i)
      _cased[i] = toupper(_cased[i]);
  }
  void down()
  {
    for(unsigned i=0; i<_cased.length(); ++i)
      _cased[i] = tolower(_cased[i]);
  }
private:
  str& _cased;
};

int main()
{
  str change = "This Will Be Changed To All One Case";
  std::cout << "\n  " << change;
  std::cout << "\n  " << (caser(change).up(), change);
  std::cout << "\n  " << (caser(change).down(), change) << "\n\n";
}