What is the cout in c++?

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What is the difference between global variables and local variable

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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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Explain the difference between abstract class and interface in c++?

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What is the need of a destructor? Explain with the help of an example.

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What is class invariant in c++?

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What is a linked list in c++?

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Is atoi safe?

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What do you mean by volatile and mutable keywords used in c++?

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What is the sequence of destruction of local objects?

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What are c++ manipulators?

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What is the difference between equal to (==) and assignment operator (=)?

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