POLYMORPHISM
IN C++
C++
achieves polymorphism through:
i)
Function overloading
ii)Operator
overloading
By
the term polymorphism we understand as ‘one interface, multiple
methods’. In both the ways i.e. function and operator overloading,
one interface or entity is made to appear having multiple methods.
FUNCTION
OVERLOADING:
In C++, two or more functions
are allowed to have same name but should have different parameters
declaration. When two or more functions share same name then they are
said to be overloaded. This process is referred as function
overloading.
For
example,
#include<iostream>
using
namespace std;
void
sum1( int i,int j);
void
sum1(float x,float y);
int
main()
{
int a,b;
a=10;
b=12;
float
p=10.2,q=20.6;
sum1(a,b);
sum1(p,q);
}
void sum1(int i, int j)
{ cout<<"int::"<<i+j;
}
void sum1(float x, float y)
{ cout<<"\nfloat:"<<x+y;
}
OUTPUT:
int::22
float:30.8
OPERATOR
OVERLOADING:
When
an operator is overloaded in C++, it takes on an additional meaning
relative to a certain class retaining its old meanings.
In
other words, operators can be overloaded by defining what they mean
relative to a specific class.
