.h中添加结构体或类
typedef struct SOE_DES
{
CString str_DevName;//设备名称
int int_SOECode;//由此参数得到事件记录的名字
unsigned short int Ia,Ib,Ic,Io;
CString strDate;
CString strTime;
bool operator==(const SOE_DES& src) const
{ //重载"=="操作符
return ( (int_SOECode == src.int_SOECode)
&& (Ia == src.Ia)
&& (Ib == src.Ib)
&& (Ic == src.Ic)
&& (Io == src.Io)
&& (strDate == src.strDate)
&& (strTime == src.strTime));
}
}SOE_Des;
class RTUObject
{
public:
CList< SOE_Des, SOE_Des> m_SOElist;//soe链表
};
.cpp中用到此链表的函数体内:
SOE_Des SOEDes;
POSITION pos = m_pRTUObject->m_SOElist.Find(SOEDes);
说明:
必须重载"=="操作符,不然编译报错
《c:/program files/microsoft visual studio/vc98/mfc/include/afxtempl.h(122) : error C2678: binary '==' : no operator defined which takes a left-hand operand of type 'const struct SOE_DES' (or there is no acceptable conversion)
c:/program files/microsoft visual studio/vc98/mfc/include/afxtempl.h(1036) : see reference to function template instantiation 'int __stdcall CompareElements(const struct SOE_DES *,const struct SOE_DES *)' being compiled
Error executing cl.exe.》
本文介绍了一个包含设备事件记录的结构体SOE_DES,并在.h文件中定义了该结构体及重载了==操作符。通过在RTUObject类中使用CList来存储SOE_DES实例,确保了链表元素比较的正确性。如果未重载==操作符,则在.cpp文件中使用Find方法时会遇到编译错误。
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