Contents
What is the condition for overloading?
Rules in function overloading The same function name is used for more than one function definition. The functions must differ either by the arity or types of their parameters.
How is it possible to have both const and non const version of a function?
Overloading on the basis of const type can be useful when a function return reference or pointer. We can make one function const, that returns a const reference or const pointer, other non-const function, that returns non-const reference or pointer.
Which operators does not allow overloading?
Most can be overloaded. The only C operators that can’t be are . and ?: (and sizeof , which is technically an operator). C++ adds a few of its own operators, most of which can be overloaded except :: and .* .
What is overloading with example?
“Method overloading is a feature of Java in which a class has more than one method of the same name and their parameters are different.” When more than one method of the same name is created in a Class, this type of method is called Overloaded Method.
What is overloading How can you avoid overloading?
It occurs when many electrical appliances of high power rating such as a geyser, a heater , an oven, a motor, etc. are switched on simultaneously . This causes fire. Overloading can be avoided by not connecting many electrical appliances of high power rating in the same circuit.
Can constructors be constant?
Can a constructor function be constant? Explanation: The constructors can’t be made const. This is to ensure that the constructor is capable of initializing the values to the members of the object. If it is made constant then it won’t be able to initialize any data member values.
What is constant member function?
The const member functions are the functions which are declared as constant in the program. The object called by these functions cannot be modified. It is recommended to use const keyword so that accidental changes to object are avoided. A const member function can be called by any type of object.
What are the pitfalls of operator overloading?
Disadvantages of an operator overloading:
- Conditional [?:], size of, scope(::), Member selector(.), member pointer selector(.
- We can only overload the operators that exist and cannot create new operators or rename existing operators.
What’s the difference between const and non const operator overloading?
It’s operator overloading with a const version and a non-const version. I understand that this lambda function, takes an index and checks its validity and then returns the index of the array data in the class. There’s also a function with the same body but with the function call as
What kind of operators can be overloaded in C + +?
Operator Overloading. All arithmetic, bitwise, relational, equality, logical, and compound assignment operators can be overloaded. In addition, the address-of, dereference, increment, decrement, and comma operators can be overloaded.
What is the return value of an overloaded operator?
The value returned from an overloaded operator is the residual value of the expression containing that operator and its operands. It is extremely important that we pay close attention to the type and value returned. It is the returned value that allows an operator to be used within a larger expression.
When does the subscript operator need to be overloaded?
The subscript operator is most frequently overloaded when a class has an array as one of its data members. For example, the C++ string class has an array of char as one of its data members. It is nice to be able to access the individual characters of the string using code like this: