Function Overloading & Operator Overloading by https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to Polymorphism en-us 2020-07-14 07:18:44 UTC 2023-05-21 17:12:31 UTC hello@padlet.com Function Overloading suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653986862 Function overloading allows a class to have several methods with the same method name but with different arguments or parameters or signatures.

It is a form of compile time Polymorphism
]]> 2020-07-14 07:46:39 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653986862 Operator overloading suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653989384 C++ allows you to specify more than one definition for an operator in the same scope, which is called  operator overloading.]]> 2020-07-14 07:51:28 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653989384 List of Operator Overloaded that cannot be overloaded suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653997672 "."         Member access or dot operator
"?:”       Ternary or conditional operator
"::"        Scope resolution operator
".*"        Pointer to member operator
"sizeof"  Size of operator

]]> 2020-07-14 08:09:41 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/653997672 Unary Operator overloading suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654000253 Let us consider unary minus operator. A minus operator when used as a unary takes just one operand. We know that this operator changes the sign of an operand when applied to a basic data item. Unary minus when applied to an object it will change the sign of each data item in the object.

            Unary overloaded operator functions can be called by expressions such as 
                        op x or x op 
where 
                        op – operator 
                        x – object

Sample Code:
]]> 2020-07-14 08:15:10 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654000253 Binary Operator Overloading suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654001575 Like unary operator overloading we can overload binary operator. In binary operator overloading we involve two objects along with an operator. In our example, we overload binary plus operator. Here in this method, we can add data items of the objects involved in the expression. Binary overloaded operator functions can be called by expressions given below:
                                    X op Y
            Where
                                    op – operator
                                    X, Y – objects
Sample Code:
]]> 2020-07-14 08:18:02 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654001575 operator overloaded function Syntax: suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654003102 return-type operator op(parameters)
{
   //body of the function
   ...
}]]> 2020-07-14 08:21:22 UTC https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654003102 Rules for Operator Overloading suhailclassroom2020 https://padlet.com/suhailclassroom2020/dmtyj0f34zg678to/wish/654005587
There are some rules for the operator overloading. These rules are like below

  • Only built-in operators can be overloaded. If some operators are not present in C++, we cannot overload them.

  • The arity of the operators cannot be changed

  • The precedence of the operators remains same.

  • The overloaded operator cannot hold the default parameters except function call operator “()”.

  • We cannot overload operators for built-in data types. At least one user defined data types must be there.

  • The assignment “=”, subscript “[]”, function call “()” and arrow operator “->” these operators must be defined as member functions, not the friend functions.

  • Some operators like assignment “=”, address “&” and comma “,” are by default overloaded. 
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