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class MyClass
{
public:
void (MyClass::*PointFunction)();

void f();
void f1();
void f2();
}

void MyClass::f1()
{
   PointFunction = &MyClass::f1;
}

void MyClass::f2()
{
   PointFunction = &MyClass::f2;
}

void MyClass::f()
{
   PointFunction(); 
//Ошибка  error: must use '.*' or '->*' to call pointer-to-member function in '((MyClass*)this)->MyClass::PointFunction (...)', e.g. '(... ->* ((MyClass*)this)->MyClass::PointFunction) (...)'
}