binary operator overloading in c++ pdf

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Chapter 10: Operator Overloading

This chapter discusses general topics in operator overloading demonstrating how to overload some of the more common operators It also includes tricks and pitfalls to be aware of when overloading certain oper-ators A Word of Warning I would be remiss to discuss operator overloading without first prefacing it with a warning: operator over-

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CSCI 104

Overloading Notes •You can overload any operator except the member operator ( ) the scope operator (::) and the ternary operator ( ? : ) –Binary operators: + - * / ++ --–Comparison operators: == != < > = –Assignment: = += -= *= /= etc –I/O stream operators: > •You cannot change the operators precedence

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CSCI 104

Binary Operator Overloading • For binary operators do the operation on a new object\'s data members and return that object –Dont want to affect the input operands data members •Difference between: x = y + z; vs x = x + z; • Normal order of operations and associativity apply (cant be changed)

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Introduction to C++ Operator Overloading

Operator Overloading Binary operators have either a single argument if they are overloaded as members (the first operand corresponds to the implicit this pointer and is therefore an object of the class in which it is defined) Or binary operators have two operands if they are overloaded as non-members

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A Summary of Operator Overloading

In schematic form when you use a binary operator (op) there is a left-hand-side operand (lhs) and a right-hand-side operand (rhs) and the whole expression has a value lhs op rhs --- has a value resulting from applying op to lhs and rhs The operator function\'s first argument is the lhs operand and the second is the rhs operand

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OPERATOR OVERLOADING

Fundamentals There are many operators available that work on built-in types like int and double Operator overloading -- is the creation of new versions of these operators for use with user-defined types Operators usually refer to C++ predefined operators: arithmetic operators: + - * / relational operators: < >=

What is the return type of overloaded operators?
The return type of overloaded operators is also defined the same as it is for overloaded functions. 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.
How do you overload a binary operator?
Another way to overload operators is by regular, non-member functions. Binary operators have 2 parameters, the second operand to the operator. The first operand is the object in which the overloaded operator is called/invoked. Unary operators have 1 parameter. Also the operator cannot access private members in the parameter objects.
Can a non-member function be overloaded?
When we overload operators as non-member functions, all operands must be explicitly specified as formal arguments. For binary operators, either the first or the second must be an object of a class; the other operand can be any type. All arithmetic, bitwise, relational, equality, logical, and compound assignment operators can be overloaded.
Should I overload an operator as a free function?
When overloading an operator as a free function, you might want to consider giving that function friend access to your class. That way, the functions can efficiently read your object's private data without having to go through getters and setters. Unfortunately, friend does not interact particularly intuitively with template classes.

Binary operator overloading in C++ C++ program add two numbers using binary operator overloading

Binary Operator Overloading in C++ Learn C++ Programming Series

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PDF	Chapter 10: Operator Overloading The function takes no parameters. This lets C++ know that the function is the unary minus function (I.e.. -myVector) rather than the binary minus function (

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