- Polymorphism means multiple forms that means having more than one function with the same name but with different functionalities.
- In C++ program there are 2 types of polymorphism, they are:
- Compile-time polymorphism
- Run-time polymorphism
Compile-time polymorphism
- At compile time which is implemented known as Compile-time polymorphism. It is otherwise known as static polymorphism.
- Method overloading is also an example for compile-time polymorphism.
- Method overloading which allows you to have more than one function with the same function name but with different functionality.
Sample Code
using namespace std;
class Multiply
{
public:
int mul(int a,int b)
{
return(a*b);
}
int mul(int a,int b,int c)
{
return(a*b*c);
}
};
int main()
{
Multiply multi;
int res1,res2;
res1=multi.mul(2,3);
res2=multi.mul(2,3,4);
cout<<"\n";
cout<<res1;
cout<<"\n";
cout<<res2;
return 0;
}
Output
Run-time polymorphism
- Run-time polymorphism is otherwise known as dynamic polymorphism.
- Function overriding is an example of runtime polymorphism that means when the child class contains the method which is already present in the parent class.
- In function overriding, parent and child class both contains the same function with the different definition.
- The call to the function is determined at runtime is known as runtime polymorphism.
Sample Code
using namespace std;
class Base
{
public:
virtual void show()
{
cout<<"Wikitechy";
}
};
class Derived:public Base
{
public:
void show()
{
cout<<"Welcome to Wikitechy";
}
};
int main()
{
Base* b;
Derived d;
b=&d;
b->show();
return 0;
}
Output
