C++ Programming: A Practical Approach

Operator Overloading 169

For example, the equality operator (==) requires two operands. It is not possible to

implement the

operator function for == by using less than or more than two operands.

(ii) There are some operators that are unary as well as binary. For example,

⫹, ⫺ and *

are unary as well as binary operators.

a=⫹5; // ⫹ as unary operator

a=4⫹9; // ⫹ as binary operator

a=⫺5; // ⫺ as unary operator

a=4⫺9; // ⫺ as binary operator

c=*p; // * as unary operator (dereferencing operator)

c=5*8; // * as binary operator

(iii) It is not possible to create new operators. Only existing operators can be overloaded.

For example, one cannot create a ...