Introduction to Function Overloading

 

Function overloading

Function Overloading means two or more functions can have the same name.

The number of arguments and the data type of the arguments will be different.

When a function is called it is selected based on the argument list.

Example:

#include <iostream>
using namespace std;
 
int add(int a, int b, int c)
{
   return(a + b + c);
}
//function overloading same name but different argument
float add(float d, float e)
{
   return (d + e);
}

int main()
{
int a,b,c;
float d,e,sum; 
   cout << "Enter three integers\n";
   cin >> a >> b >>c;
   sum = add(a, b, c);
   cout << "Sum of integers is " << sum << "\n";
 
   cout << "Enter two floating point numbers\n";
   cin >> d >> e;
   sum = add(d, e);
   cout << "Sum of floating point numbers is " << sum << "\n";
   return 0;
} 

Output:- Enter three integers

2

2

2

Sum of integers is 6

Enter two floating point numbers

2.5

2.5

Sum of floating point numbers is 5

Difference between Overloading and overriding

Overloading can occur without inheritance

Overriding occurs when one class is inherited from another

In overloading the arguments and the return type must differ

In overriding, the arguments and the return type must be the same

In overloading the function name is the same, But it behaves differently depending on the arguments passed to them

In overriding the function name is same, but Derived class function can perform different operations from the base class