Method Overloading

Multiple methods having same name but different in parameters is known as Method Overloading. Method overloading is a form of polymorphism. If we try to define more than one method with the same name and the same number of arguments then the compiler will throw an error.

Method overloading can be achieved by following atleast either one of below rules
1. Total number of parameters in the method must be different.
2. Datatype of the parameters in the method must be different.

CODE

EG 1 . Creating 3 method overloads for addition method

#include <iostream>
using namespace std;

void Addition(int number1,int number2);
void Addition(double number1, double number2);
void Addition(int number1, int number2, int number3);

int main(){
    //Addition method with 2 integer parameters will be invoked.
    Addition(5,6);
    //Addition method with 2 double parameters will be invoked.
    Addition(5.64, 8.98);
    //Addition method with 3 integer parameters will be invoked.
    Addition(7,8,9);
}
void Addition(int number1,int number2) {
    cout << number1+number2 << endl;
}
void Addition(double number1, double number2) {
    cout << number1 + number2 << endl;
}
void Addition(int number1, int number2, int number3) {
    cout << number1 + number2 + number3 << endl;
}

OUTPUT
11
14.62
24

CODE EXPLANATION
In the above code, We created 3 overloads for Addition method. Where one Addition method having 2 integer values as parameters, another Addition method having 2 double values as parameters, another Addition method having 3 integer value as parameters. Depending on the arguments what we going to pass while invoking Addition method, system will determine what method overload to invoke.


What is the advantage of using Method overloading?
The advantage of method overloading is that it increases code readability and maintainability. Although it is possible to have methods with the same name that perform a totally different function, it is advised that overloaded methods must have similarities in the way they perform. In simple terms, If we need to do the same kind of the operation in different ways i.e. for different inputs then we need to go with method overloading.

Exercises
1. Create any 5 method overloads for subtraction method.
2. Create any 3 method overloads for Multiplication Table method.


(Click Here, For more exercises)