结构在new的时候出错！

[DSound]

MyPack = new MyPacket;
在不包含StdAfx.h文件的的类里面声明的时候出错
e:\test\testbuffer.cpp(489) : error C2065: 'DEBUG_NEW' : undeclared identifier
e:\test\testbuffer.cpp(489) : error C2440: '=' : cannot convert from 'int' to 'struct MyPacket *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
e:\test\testbuffer.cpp(489) : error C2146: syntax error : missing ';' before identifier 'MyPacket'
e:\test\testbuffer.cpp(489) : error C2275: 'MyPacket' : illegal use of this type as an expression
e:\test\testbuffer.h(15) : see declaration of 'MyPacket'
Error executing cl.exe.

[FlyYang]

把你文件中的下面两行删除
#ifdef _DEBUG
#define new DEBUG_NEW

---------
++C++
---------

[Linux2001]

同意楼上的

[DSound]

请问是为什么？这两行有什么用吗？