Write a c++ code that will calculate the roots of a quadratic equation a2+ bx+c=0 Hint: d = sqrt (b2-4ac), and the roots are: x1 = (€“b + d)/2a and x2 = (€“b €“ d)/2a (use sqrt function from cmath.h )?

0 Answers   Maxobiz,

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When should you use global variables?

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1. What does the following do: void afunction(int *x) { x=new int; *x=12; } int main() { int v=10; afunction(&v); cout<<v; } a) Outputs 12 b) Outputs 10 c) Outputs the address of v

5 Answers   Quark,

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When one must use recursion function? Mention what happens when recursion functions are declared inline?

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What do you mean by static variables?

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Write a struct time where integer m, h, s are its members?

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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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Why cstdlib is used in c++?

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Why do C++ compilers need name mangling?

3 Answers   Lucent,

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What is iomanip c++?

0 Answers  

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how to access grid view row?

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How do you flush std cout?

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