Define virtual constructor.

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What is the basic structure of c++ program?

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What is Pure Virtual Function? Why and when it is used ?

10 Answers   Lucent, Sona,

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class X { private: int a; protected: X(){cout<<"X constructor was called"<<endl;} ~X(){cout<<"X destructor was called"<<endl} }; Referring to the code above, which one of the following statements regarding "X" is TRUE? a) X is an abstract class. b) Only subclasses of X may create X objects. c) Instances of X cannot be created. d) X objects can only be created using the default copy constructor. e) Only friends can create instances of X objects.

2 Answers   Quark,

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What are the two types of comments, and how do they differ?

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Why are pointers used?

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How to reduce a final size of executable?

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class X { public: int x; static void f(int z); }; void X::f(int y) {x=y;} What is the error in the sample code above? a) The class X does not have any protected members. b) The static member function f() accesses the non-static z. c) The static member function f() accesses the non-static x. d) The member function f() must return a value. e) The class X does not have any private members.

2 Answers   Quark,

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What is "strstream" ?

1 Answers   Huawei,

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what is oops and list its features in c++?

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I want to write a C++ language program that: 1. Reads in the size of a square from the screen; 2. Prints a hollow square of that size out of “-“, “|” and blanks on screen; 3. Prints the same hollow square onto a text file. The program should work for squares of all side sizes between 1 and 20.

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Describe the process of creation and destruction of a derived class object?

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