What is the difference between operator overloading and function overloading

So, the compiler can differentiate and find out which function to call depending on the context. In case of operator overloading, you try to create your own functions which are called when the corresponding operator is invoked for the operands. One important thing to understand is that you can create as many functions as you want with the same name and sifferent signatures so that they can work diffrently but for a particular class, you cannot overload the operator function based on number of arguments.

There is a fundamental reason behind this. It can be done in base as well as derived class. Function Overriding achieved at run time It is the redefinition of base class function in its derived class with same signature i. It can only be done in derived class. Display ; dr.

Overloading can occur without inheritance. Function Signature: Overloaded functions must differ in function signature ie either number of parameters or type of parameters should differ. In overriding, function signatures must be same. Scope of functions: Overridden functions are in different scopes; whereas overloaded functions are in same scope.

You can have multiple definitions for the same function name in the same scope. You cannot overload function declarations that differ only by return type. Thus, a programmer can use operators with user-defined types as well. Overloaded operators are functions with special names: the keyword "operator" followed by the symbol for the operator being defined. If we have to perform a single operation with different numbers or types of arguments, we need to overload the function.

In OOP, function overloading is known as a function of polymorphism. The function can perform various operations best on the argument list. It differs by type or number of arguments they hold. By using a different number of arguments or different types of arguments, the function can be redefined.

If I say parameter list, it means the data type and sequence of the parameters. For example, the parameters list of a function myfunction int a, double b is int, double , which is different from the function myfunction double a, int b parameter list double, int.

Function overloading is a compile-time polymorphism. The easiest way to remember this rule is that the parameters should qualify any one or more than one of the following conditions:. Here is an example:. Function overloading is similar to polymorphism that helps us to get different behavior, with the same name of the function. The above three cases are valid cases of overloading. We can have any number of functions, but remember that the parameter list must be different.

For example:. As the parameter list is the same, this is not allowed.