MFC - Find if a given string is numeric

Find if a given string is numeric

bool IsNumeric(const CString& str, bool bIsInt)
{
 int nSize = str.GetLength();
 int ReturnValue = 0;
 int DotCounter = 0;
 bool bContiue = true;

 //-------Case of integer--------------------------
 if ( bIsInt )
 {
  // Goes over the string characters
  for ( int i=0; i < nSize; i++ )
  {
   ReturnValue = isdigit( str.GetAt(i) );
   if ( !ReturnValue )
   {
    CString strChar = str.GetAt(i);
    if ( (i == 0) && (strChar=="-") )
     bContiue = true;
    else
     bContiue = false;
   }

   if ( !bContiue )
    return false;
  }

  return true;
 }

 //-------Case of double----------------------
 // Goes over the string characters
 for ( int i=0; i < nSize; i++ )
 {
  ReturnValue = isdigit( str.GetAt(i) );
  if ( !ReturnValue )
  {
   CString strChar = str.GetAt(i);
   if ((i == 0) && (strChar=="-") )
    bContiue = true;
   else if ( (i!=0) && (strChar== ".") && (DotCounter==0) )
   {
    DotCounter = 1;
    bContiue = true;
   }
   else
    bContiue = false;
  }

  if ( !bContiue )
   return false;
 }

 return true;
}

C++ - How to convert between 'CString' and 'std::string'?

Simple But Still Annoying



'CString' to 'std::string'

Code:

CString cs("Hello");
std::string s((LPCTSTR)cs);

'std::string' to 'CString':

Code:

std::string s("Hello");
CString cs(s.c_str());