What about Virtual Destructor?

1 Answers   Virtusa,

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Explain "passing by value", "passing by pointer" and "passing by reference" ?

5 Answers  

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class Alpha { public: char data[10000]; Alpha(); ~Alpha(); }; class Beta { public: Beta() { n = 0; } void FillData(Alpha a); private: int n; }; How do you make the above sample code more efficient? a) If possible, make the constructor for Beta private to reduce the overhead of public constructors. b) Change the return type in FillData to int to negate the implicit return conversion from "int" to "void". c) Make the destructor for Alpha virtual. d) Make the constructor for Alpha virtual. e) Pass a const reference to Alpha in FillData

2 Answers   Quark,

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Define upcasting.

0 Answers  

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write a c++ program that gives output 4 3 4 2 3 4 1 2 3 4 using looping statement

4 Answers  

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What are guid? Why does com need guids?

0 Answers  

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What are iterators in c++?

0 Answers  

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daily Routine of father

0 Answers  

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Give a very good method to count the number of ones in a "n" (e.g. 32) bit number.

3 Answers  

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How a macro differs from a template?

0 Answers  

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What is the first name of c++?

0 Answers  

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what is C++ exceptional handling?

0 Answers  

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