C++ function

• Xcert

  19 Mar 08, 01:29

  I need help with this C++ function.

   

  VOID __cdecl Buffer(LPCTSTR lpInput, ...)

  {

  //some code

  }

   

  What is the meaning of the "..." as part of its input parameters?

  I know the meaning of __cdecl but got stuck with the "..."

   

  This code can be compiled and executed so its not some typing error or fill-in-the-blank thingy.

  Anyone can help?

• dumbdumb!

  19 Mar 08, 02:24

  Originally posted by Xcert:

  I need help with this C++ function.

   

  VOID __cdecl Buffer(LPCTSTR lpInput, ...)

  {

  //some code

  }

   

  What is the meaning of the "..." as part of its input parameters?

  I know the meaning of __cdecl but got stuck with the "..."

   

  This code can be compiled and executed so its not some typing error or fill-in-the-blank thingy.

  Anyone can help?

  what does _cdecl do? and what is LPCTSTR lpInput for?

• Alucard101

  19 Mar 08, 05:47

  Never seen a code like tht before.Is it some type of header file?

• Xcert

  19 Mar 08, 12:29

  Originally posted by dumbdumb!:

  what does _cdecl do? and what is LPCTSTR lpInput for?

  simply put...__cdecl is more for declaring functions in C language. Its a default calling convention.

  The C programming that we are taught is not really C.Its C++...which is an improved version of C....and so a lot of background things have already been done for us in C++.

  LPCTSTR is long pointer string constant.

• Xcert

  19 Mar 08, 12:32

  Originally posted by Alucard101:

  Never seen a code like tht before.Is it some type of header file?

  not surprising for the kind of C++ programming that are being taught in polys. Good enough for  concepts and basic programming skills...Not quite there for serious programming.

   

  Its in a .C source file.

• ndmmxiaomayi

  19 Mar 08, 15:02

  Tried removing the .... and see what happens? I never see ... as part of the parameters.

  Also try writing some codes that doesn't use LPCTSTR lpInput parameters. The ... might start throwing some errors.

• LatecomerX

  19 Mar 08, 20:29

  Originally posted by Xcert:

  I need help with this C++ function.

   

  VOID __cdecl Buffer(LPCTSTR lpInput, ...)

  {

  //some code

  }

   

  What is the meaning of the "..." as part of its input parameters?

  I know the meaning of __cdecl but got stuck with the "..."

   

  This code can be compiled and executed so its not some typing error or fill-in-the-blank thingy.

  Anyone can help?

  Found it through Google.

  http://msdn2.microsoft.com/en-us/library/k64h826d(VS.80).aspx

  It's known as the ellipsis notation which allows the user (as in the script that uses that function) to insert a variable number of parameters into the function. A useful application for this would be a function that calculates the sum of all the parameters given.

   

• LatecomerX

  19 Mar 08, 20:32

  Originally posted by Xcert:

  not surprising for the kind of C++ programming that are being taught in polys. Good enough for  concepts and basic programming skills...Not quite there for serious programming.

   

  Its in a .C source file.

  Walau, don't so bad leh, unker. If like that I go in poly learn basic stuff nia meh?

   

• Xcert

  24 Mar 08, 01:53

  Thanks for the MSDN link.

   

  if U know how to get info from MSDN...I dont think C++ programming in poly will be something difficult for U.