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What do you understand the polymorphism in C++ programming language?

What polymorphism word means?
-The word polymorphism means having many forms.
or
-we can define polymorphism as the ability of a message to be displayed in more than one form.

Basically, polymorphism have two forms:
-compile time polymorphism(static polymorphism)
-run time polymorphism(dynamic polymorpohism)

Compile time polymorphism:

Example of compile time polymorphism is:
-Function overloading
-Operator overloading

Run time overloading:
Example of run time polymorphism is:
-Function overriding

Function overloading:
Function overloading is a feature in C++ where two or more functions can have the same name but different parameters.

program:

#include < iostream>

using namespace std;
class r4r
{
public:
int sum(int a,int b, int c)
{
cout<<"Sum is: "<< a+b+c<< endl;
}
int sum(int a,int b)
{
cout<<"Sum is: "<< a+b<< endl;
}
int sum(double a,double b)
{
cout<<"Sum is: "<< a+b<< endl;
}
};

int main()
{
r4r obj;
obj.sum(2,3,4);
obj.sum(1,2);
obj.sum(3.2,4.1);
return 0;
}


output-

Sum is: 9
Sum is: 3
Sum is: 7.3


Function overriding:
If derived class defines same function as defined in its base class, it is known as function overriding in C++.

program:

#include < iostream>
using namespace std;
class parent {
public:
void func(){
cout<<"This is my parent function";
}
};
class child: public parent
{
public:
void func()
{
cout<<"Child function";
}
};
int main(void) {
child d = child();
d.func();
return 0;
}


output-

Child function




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