#include <iostream>
using namespace std;
struct wow {
int x;
};
int main() {
wow a;
wow *b;
a.x = 22;
b = &a;
a.x = 23;
cout << b->x;
return 0;
}
What is a linked list?
suppose A is a base class and B is the derved class. Both have a method foo which is defined as a virtual method in the base class. You have a pointer of classs B and you typecast it to A. Now when you call pointer->foo, which method gets called? The next part of the question is, how does the compiler know which method to call?
Plese get me a perfect C++ program for railway/airway reservation with all details.
what is a class
What is namespace?
Can anyone please explain runtime polymorphism with a real time example??at what ciscumstances we go for it??
what is the usage of clas templates
What is multidimensional array?
some one give d clear explanation for polymorphism
Is oop better than procedural?
what is the abstract class,interface ,its difference with a programatic eg.? hi,recently i went for an interview they ask me what is abstract class ,interface and its difference I said abstract class contain abstact method ,abstract method is a method with no body.Abstract class cannot be instantiated.Abstract class is a base class it required derived class for the implementation of method. Interface is a syntactical contract that all derived class should follow it define properties ,method,events which are known as member of interface. Then They asked me what is the difference between them. I said abstract class interface 1.abstact class can implement method 1.interface cant 2.abstact class can contain constructor, 2.interface cant destructor 3.abstract class cannot support multiple 3.interface support inheritance etc Then they said some different answer I said dont no. Then they ask me when i should make abstract class for an project and when i should make interface. I said if suppose there is two class which must be having method with different logic then we sholud make abstract class. and if suppose we have two class having method .with different logic then we can make interface . Am i correct with my explaination.if not correct me .please provide me that when should we create abstract class and interface and what is difference .please help me
What is difference between polymorphism and inheritance?