What is function overloading?

What is function overloading? 

Function overloading means we can use the same function name to create functions that perform a variety of different tasks. 

For example, we overloaded add( ) function, which further handles different data types as shown below. 

Different Function Declatations

1. int add( int a, int b); //add function with 2 arguments of same type 

2. int add( int a, int b, int c); //add function with 3 arguments of same type 

3. float add( int a, float d); //add function with 2 arguments of different type 

Function calls for defferent functions declarations above: 

1. add (3 , 4); // this function call uses prototype of function declaration 1 

2. add (3, 4, 5); //this function call uses prototype of function declaration 2  

3. add (3 , 10.0); //this function call uses prototype of function declaration 3 

C++ program which implement the Function overloading feature.

Program Code:

#include<iostream>

using namespace std;

int add( int a, int b);

int add( int a, int b, int c);

float add( int a, float d);

int main()

{

int a, b, c;

float d;

cout<<"Enter a and b and c: ";

cin>>a>>b>>c;

cout<<endl;

cout<<"Enter d : ";

cin>>d;

cout<<endl;

add (a , b);

cout<<endl;

add (a, b, c);

cout<<endl;

add (a , d);

return 0;

}

int add( int a, int b)

{

cout<<"Addition of a and b :"<<a+b;

}

int add( int a, int b, int c)

{

cout<<"Addition of a, b and c :"<<a+b+c;

}

float add( int a, float d)

{

cout<<"Addition of a and d :"<<a+d;

}

The program output is tested on www.jdoodle.com

Output:

Enter a and b and c: 1 2 3 

Enter d : 12.5

Addition of a and b :3

Addition of a, b and c :6

Addition of a and d :13.5

Thanks

Mukesh Rajput