struct SClass{
int iNumber;
int (*fpgetValue)();
int (*fpsetValue)();
}Sc;
int m_Func(){
printf("\n\n Hello How are you doing,i called by function pointer");
getchar();
return 1;
}
int _tmain(int argc, _TCHAR* argv[])
{
Sc.fpgetValue=m_Func;
Sc.fpgetValue();
return 0;
}
Inherit is not a function. It is a class derivation where some of the methods and attributes of the new class inherit from a parent class.
No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.
A class declared as final means that no other class can inherit from it.
Any class which has one or more abstract methods is called an abstract class. But in the normal class we can't have any abstract methods. We cannot create an object for the abstract classes. When we inherit the abstract class we should implement the abstract method which we inherit.
Virtual classes are useful when you have a derived class that has two base classes which are themselves derived from a common base class. That is, if class A is derived from classes B and C, and classes B and C are both derived from class D, then class A would inherit two instances of class D (one from B, the other from C). This introduces an ambiguity when referring directly to D from A, because there is no way to determine which instance of D you are referring to. By declaring class D to be a virtual base class of both B and C, they will both share the same instance of D, virtually, thus eliminating the ambiguity.
Inherit is not a function. It is a class derivation where some of the methods and attributes of the new class inherit from a parent class.
The "Object" class is the topmost class in the class hierarchy. Classes inherit directly from this class by default; all classes inherit from Object directly or indirectly.
Single-inheritance is where one class inherits directly from another class: class A {}; class B : public A {}; Here, class B inherits all the public and protected members of class A. Multiple-inheritance is where one class inherits directly from two or more classes: class A {}; class B {}; class C : public A, public B {}; Here, class C inherits all the public and protected members of both A and B. Multi-level inheritance is where one class inherits from another class that itself derived. class A {}; class B : public A {}; class C : public B {}; Here, class B inherits all the public and protected members of A while class C inherits all the public and protected members of B, including those inherited from A. Virtual inheritance applies to multi-level inheritance whereby a virtual base class becomes a direct ancestor to the most-derived class. This variation of inheritance is typically used in multiple inheritance situations where two or more intermediate classes inherit from the same base class: class A {}; class B : public virtual A {}; class C : public virtual A {}; class D : public B, public C {}; Here, classes B and C both inherit from class A. Without virtual inheritance this would mean class D would inherit two instances of A (B::A and C::A), thus creating ambiguity when referring to D::A. By employing virtual inheritance, D inherits directly from A, and both B and C inherit from D::A. In other words, B and C share the same instance of A. Another use of virtual inheritance is when you need to make a class final. class A; class B { friend class A; B() {} // private constructor }; class A : public virtual B { }; Here, class A is the final class. Class B is a helper class that has a private constructor while class A is declared a friend of class B. Class A is therefore the only class that can inherit from class B as it is the only class that can construct objects from class B. However, by inheriting class B virtually, we ensure that no other class can be derived from class A because virtual inheritance ensures that the most-derived class must be able to construct a class B object first. Currently, only class A has that privilege and must always be the most-derived class.
No. Class diagrams only apply to object-oriented languages where one class can inherit or derive from another. There is no inheritance model in C, thus data structures cannot be derived.
No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.No; that is the default. In other words, if you don't add "extends", the class will automatically inherit from the "Object" class.
Multiple inheritance in C# In C#, the classes are only allowed to inherit from a single parent class, which is called single inheritance. But you can use interfaces or a combination of one class and interface(s), where interface(s) should be followed by class name in the signature.
Multiple Inheritance : we can inherit more than one class in the same class. Multi-Level Inheritance: where one class can inherit only one base class and the derived class can become base class of some other class.
A class declared as final means that no other class can inherit from it.
All classes in java must inherit from the Object class
Any class which has one or more abstract methods is called an abstract class. But in the normal class we can't have any abstract methods. We cannot create an object for the abstract classes. When we inherit the abstract class we should implement the abstract method which we inherit.
no u cant abstract class u can just inherit from
You can't inherit from sealed classes.