Explain these c++ concepts WILL ADD ANOTHER 1500 POINTS BY ASKING A NEW QUESTION

Question

Explain these c++ concepts WILL ADD ANOTHER 1500 POINTS BY ASKING A NEW QUESTION IF THESE ALL GET ANSWERED

Explaining concepts:
a. How can we tell if a member function of a C++ class is a constructor?
What is a constructor for?
b. How can we tell if a member function of a C++ class is a copy
constructor?
c. Do we have to provide a copy constructor? Why or why not?
d. How can we declare a constant member function? Why do we need
constant member functions?
e. Ordinary functions and member functions of a class may be overloaded.
Use an example to explain the notion of function overloading.
f. How can we tell if a member function of a C++ class is a destructor? What
is a destructor for?
g. The standard operators such as <<, >>, =, and so on, may be redefined in a
class or overloaded. How do we do that?
h. We can specify whether a member field or a member function of a class is
private or public. What are implications of these concepts?
j. Compare and contrast C++ string and C style string.
k. When should we use

Explanation / Answer

a) If its name is same as class name. It is used for initializing class members.

b) classname (const classname &obj) {
// body of constructor
}

c) Yes u have to provide a copy constructor.

d)Declaring a member function with the const keyword specifies that the function is a "read-only" function that does not modify the object for which it is called. A constant member function cannot modify any non-static data members or call any member functions that aren't constant.

e)Eg: area(int l,int w) // for rectangle
area(int a) // for square
area(int b, int h) // for triangle

f)className::~className(void)
{
cout << "Object is being deleted" << endl;
}

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