Thread: to lower or to upper that is the question!

I'm getting strange output when I print a conversion to upper and lower....here it is:

22. Testing: CaseString class.

s22 "BaLLooN" String Length: 7
Lower Case:
büllÅÅn
Upper Case:

t22 "BaLLooN" String Length: 7
Lower Case:
büllÅÅn
Upper Case:

u22 "BaLLooN" String Length: 7
Lower Case:
büllÅÅn
Upper Case:


Press any key to continue.



I have no idea why, I'm staring at the msdn and it looks like I'm doing everything right m_buf is coming from a String class of which this Case class is derived. Just an ordinary string buffer.....

Code:

#include "stdafx.h"
#include "string.h"
#include "case.h"

Case::Case() : String()
{
}

Case::Case(const Case& cs) : String(cs)
{
}

Case::Case(char* str) : String(str)
{
}

Case::~Case()
{
	if(NULL != m_name)
	{
		delete[]m_name;
		m_name=NULL;
	}
	if(NULL != m_buf)
	{
		delete[]m_buf;
		m_buf=NULL;
	}
}



Case& Case::operator=(const Case& cs)
{
	if(this == &cs)
   {
	   return *this;
   }
	String::operator=(cs);
	m_length = cs.m_length;
	if(NULL != m_buf)
	{
		delete[]m_buf;
		m_buf = NULL;
	}
    m_buf = new char[m_length + 1];
	strcpy_s(m_buf, m_length + 1, cs.m_buf);
  	   
	return *this;
}

void Case::print()
{
	m_lower = m_buf;
	m_upper = m_buf;

	cout << m_name << " \""<< m_buf << "\"  String Length: " << getLength() << endl;
	
	cout << "Lower Case: " << endl;
	if(isupper (*m_lower))
	{
		for( m_lower; m_lower < m_buf + strlen(m_buf); m_lower++ )
		{
			putchar( _tolower( *m_lower ) );
		}
	}

	cout << endl;

	cout << "Upper Case: "<< m_lower<< endl;

	if(islower (*m_upper))
	{
		for( m_upper; m_upper < m_buf + strlen(m_buf); m_upper++ )
		{
			putchar( _toupper( *m_upper ) );
		}
	}

	cout << endl;
	

}

 Am I just messing the obvious???