C / C++ / MFC

long differenceInSeconds
  (long nStartHour,
   long nStartMinute,
   long nStartSecond,
   long nEnd Hour,
   long nEndMinute,
   long nEndSecond)
{
  long nStart = nStartHour*3600 + nStartMinute*60 + nStartSecond;
  long nEnd = nEndHour*3600 + nEndMinute*60 + nEndSecond;
  return (nEnd - nStart);
}

CAzg  a;  // this object is referenced in other files

char* myString = "Paul";
reverseString (myString);
 
void reverseString
  (char* pString)
{
  for (nIndex=0; (nIndex < strlen (pString)); nIndex++) {
       long nTarget = strlen (pString) - nIndex - 1;
       if (nIndex != nTarget) {
          char chTemp = pString [nIndex];
          pString [nIndex] = pString [nTarget];
          pString [nTarget] = chTemp;
       }
  }
}

void reverseString  (char* pString)
{
  int nLast = strlen (pString) - 1;
  for (int nIndex = 0; nIndex < nLast; nIndex++, nLast--)
  {
    char chTemp = pString [nIndex];
    pString [nIndex] = pString [nLast];
    pString [nLast] = chTemp; 
  }
}