sorry, it should be
void NEW(int i){
CMyClass *a_i=new CMyClass();
cout<<a_i->m_i<<endl
}
"Xiutao Yang" <xiutao.yang@[EMAIL PROTECTED]
>
写入消息新闻:fu2fli$39m$1@[EMAIL PROTECTED]
> thx,all
> Now, I found the reason.
> void NEW(int i){
> NEWW(i);
> PPR(i);
> }
> wil be compiled as
> void NEW(int i){
> CMyClass *a_##i=new CMyClass();
> cout<<a_##i->m_i<<endl
>
> }
> Of course, It works well :P
>
> thx again.
>
> "Ben Bacarisse" <ben.usenet@[EMAIL PROTECTED]
>
??????:874pa3jqhd.fsf@[EMAIL PROTECTED]
>> "Xiutao Yang" <xiutao.yang@[EMAIL PROTECTED]
> writes:
>>
>>> I have a program about ## ,which is the following.
>> <snip>
>>
>>> #define F(i) F_##i()
>>
>> <snip more pre-processor mangling>
>>
>>> The question is the I can call NEWW(i) in function void NEW(int i)
>>> But failed in processing function void FF(int i)?
>>> If we write void FF(int i) as:
>>> void FF(int i){
>>> F(i);
>>> }
>>> It will fail.
>>
>> That is because FF(i) expands to F_i() and there is no F_i defined.
>> Presumably in NEWW(i) the value of i does not matter. You seem to
>> want the pre-processor (which runs once when you program is built) to
>> know about the value of variables at run-time. It just can't.
>>
>> Back up a bit and explain what you are doing and why you think this is
>> the right solution.
>>
>> --
>> Ben.
>
>
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