静态函数的定义和调用(捡分的题)

[thebestone111]

#ifndef __COMOPRE__
//----------------TComOpre.h
#define __COMOPRE__
class TComOpre
{
public:
HANDLE hd_com1,hd_com2;

BOOL opencom(int port);
static CString getvalue();

};

#endif __COMOPRE__

//----------------TComOpre.cpp
#include "stdafx.h"
#include "ComOpre.h"


BOOL TComOpre::opencom(int port)
{
return true;
}

static CString getvalue()
{
return "xxx";
}
//----------------------
xxxx.cpp
#include "TComOpre.h"
....
void CMy008Dlg::Onopen1()
{

CString aa;
aa = TComOpre.getvalue();
}
编译结果如下
------------------------------------------------------------------
--------------------Configuration: 008 - Win32 Debug--------------------
Compiling...
008Dlg.cpp
D:\XJ_Work_Station\test\1127\008\008Dlg.cpp(133) : error C2275: 'TComOpre' : illegal use of this type as an expression
d:\xj_work_station\test\1127\008\comopre.h(5) : see declaration of 'TComOpre'
执行 cl.exe 时出错.

008.exe - 1 error(s), 0 warning(s)

[vcmute]

static CString TComOpre::getvalue()
{
return "xxx";
}

[thebestone111]

to vcmute(横秋) 不行
--------------------Configuration: 008 - Win32 Debug--------------------
Compiling...
ComOpre.cpp
D:\XJ_Work_Station\test\1127\008\ComOpre.cpp(11) : error C2724: 'getvalue' : 'static' should not be used on member functions defined at file scope
执行 cl.exe 时出错.
Creating browse info file...

008.exe - 1 error(s), 0 warning(s)

[菜牛]

aa = TComOpre::getvalue();

[ringphone]

CString::getvalue()
{
return "xxx";
}

[ringphone]

错了，是
CString TComOpre::getvalue()
{
return "xxx";
}

[thebestone111]

行了！！！
to ringphone(临风)
为什么在函数申明时要加static，但在具体函数的地方却不用加

[cky41]

cpp文件中的类静态函数要这样定义，结合你的程序就是
CString TComOpre::getvalue()

在调用时要这样
void CMy008Dlg::Onopen1()
{

CString aa;
- aa = TComOpre.getvalue();
+ aa = TComOpre::getvalue();
}