VC++ 2005 B2 error C3766:'ClassXXX' must provide an implementation for the interface method '
Hi All:
I have complied the code from MSDN library for Vs2005b2, which is the example of 'interface class'. The codes are as follows:
//=========================================
// mcppv2_interface_class.cpp
// compile with: /clr
using namespace System;
public delegate void ClickEventHandler(int, double);
// define interface with nested interface
public interface class Interface_A {
void Function_1();
interface class Interface_Nested_A {
void Function_2();
};
};
// interface with a base interface
public interface class Interface_B : Interface_A {
property int Property_Block;
event ClickEventHandler^ OnClick;
static void Function_3() { Console::WriteLine("in Function_3"); }
};
// implement nested interface
public ref class MyClass : public Interface_A::Interface_Nested_A {
public:
void Function_2() { Console::WriteLine("in Function_2"); }
};
// implement interface and base interface
public ref class MyClass2 : public Interface_B {
private:
int MyInt;
public:
// implement non-static function
void Function_1() { Console::WriteLine("in Function_1"); }
// implement property
property int Property_Block {
int get() { return MyInt; }
void set(int value) { MyInt = value; }
}
// implement event
event ClickEventHandler^ OnClick;
void FireEvents() {
OnClick(7, 3.14159);
}
};
// class that defines method called when event occurs
ref class EventReceiver {
public:
void OnMyClick(int i, double d) {
Console::WriteLine("OnClick: {0}, {1}", i, d);
}
};
int main() {
// call static function in an interface
Interface_B::Function_3();
// instantiate class that implements nested interface
MyClass ^ x = gcnew MyClass;
x->Function_2();
// instantiate class that implements interface with base interface
MyClass2 ^ y = gcnew MyClass2;
y->Function_1();
y->Property_Block = 8;
Console::WriteLine(y->Property_Block);
EventReceiver^ MyEventReceiver = gcnew EventReceiver();
// hook handler to event
y->OnClick += gcnew ClickEventHandler(MyEventReceiver, &EventReceiver::OnMyClick);
// invoke events
y->FireEvents();
// unhook handler to event
y->OnClick -= gcnew ClickEventHandler(MyEventReceiver, &EventReceiver::OnMyClick);
// call implemented function via interface handle
Interface_A^ hi = gcnew MyClass2();
hi->Function_1();
}
//=========================================
But I got many errors, most of which like :
error C3766: 'MyClass' must provide an implementation for the interface method 'void Interface_A::Interface_Nested_A::Function_2(void)'
I don't see any syntax error in the code, and I can't find the explanation for 'error C3766' in MSDN document. My VS2005 version is 8.0.50215.44 (beta2.050215-4400).
Is there anybody can give me some advice? Thanks
