一个小错误

Question

我在程序中有以下代码：
void CDlgDP::Start()
{
PINPUTPARAM lpThreadParam = new INPUTPARAM;
lpThreadParam->BaudRate = 9600;
lpThreadParam->ByteSize = 8 ;
lpThreadParam->ChannelsNO = 3;
lpThreadParam->HighRation = 0x19;
lpThreadParam->nSerialPort = 1;
lpThreadParam->Parity = EVENPARITY;
lpThreadParam->StopBits = ONESTOPBIT;
m_ReadThread = AfxBeginThread(ReadCF900K,(LPVOID)lpThreadParam,THREAD_PRIORITY_NORMAL);
}UINT / *CDlgDP:: * /ReadCF900K(LPVOID lpParam)
{
}
ReadCG900K作为全局函数，出现以下错误
error C2065: 'ReadCF900K' : undeclared identifier
为什么，解决给分

Answer 1

你已经定义了一个全局函数，又在这个dlgdp.cpp里面UINT / *CDlgDP:: * /ReadCF900K(LPVOID lpParam)肯定是不行的
你已经定义了，使用就可以了
这样是干什么？

Answer 2

在你的实现文件前面先声明UINT ReadCF900K(LPVOID lpParam);
至少必须在void CDlgDP::Start()的前面先声明UINT ReadCF900K(LPVOID lpParam);---------
  ++C++
---------

Answer 3

void CDlgDP::Start()
{
PINPUTPARAM lpThreadParam = new INPUTPARAM;
lpThreadParam->BaudRate = 9600;
lpThreadParam->ByteSize = 8 ;
lpThreadParam->ChannelsNO = 3;
lpThreadParam->HighRation = 0x19;
lpThreadParam->nSerialPort = 1;
lpThreadParam->Parity = EVENPARITY;
lpThreadParam->StopBits = ONESTOPBIT;
m_ReadThread = AfxBeginThread(ReadCF900K,(LPVOID)lpThreadParam,THREAD_PRIORITY_NORMAL);
}UINT CDlgDP::ReadCF900K(LPVOID lpParam)
{
}

Answer 4

UINT ReadCF900K(LPVOID lpParam)
{
}
CDlgDP::Start()
{
PINPUTPARAM lpThreadParam = new INPUTPARAM;
lpThreadParam->BaudRate = 9600;
lpThreadParam->ByteSize = 8 ;
lpThreadParam->ChannelsNO = 3;
lpThreadParam->HighRation = 0x19;
lpThreadParam->nSerialPort = 1;
lpThreadParam->Parity = EVENPARITY;
lpThreadParam->StopBits = ONESTOPBIT;
m_ReadThread = AfxBeginThread(ReadCF900K,(LPVOID)lpThreadParam,THREAD_PRIORITY_NORMAL);
}

Answer 5

在void CDlgDP::Start()前加
UINT / *CDlgDP:: * /ReadCF900K(LPVOID lpParam);