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Unary operators are those which operate on a single variable. Overloading unary operator means extending the operator’s original functionality to operate upon object of the class. The declaration of a overloaded unary operator function precedes the word operator.For example, consider class 3D which has data members x, y and z and overloaded increment operators:class 3D{          int x, y, z;         public:              3D (int a=0, int b=0, int c=0)               {                     x = a;                     y = b;                      z = c;              }              3D operator ++() //unary operator ++ overloaded               {                        x = x + 1;                         y = y + 1;                        z = z + 1;                        return *this; //this pointer which points to the caller object                }               3D operator ++(int) //use of dummy argument for post increment                          operator               {                      3D t = *this;                       x = x + 1;                       y = y + 1;                       z = z + 1;                       return t; //return the original object                }               3D show()                {                       cout<<”The elements are:\n”                       cout<<”x:”<<this->x<<”, y:<this->y <<”, z:”<<this->z;                }};int main(){        3D pt1(2,4,5), pt2(7,1,3);         cout<<”Point one’s dimensions before increment are:”<< pt1.show();         ++pt1; //The overloaded operator function ++() will return object’s this pointer         cout<<”Point one’s dimensions after increment are:”<< pt1.show();         cout<<”Point two’s dimensions before increment are:”<< pt2.show();          pt2++; //The overloaded operator function ++() will return object’s this pointer          cout<<”Point two’s dimensions after increment are:”<< pt2.show();           return 0;}The o/p would be:Point one’s dimensions before increment are:x:2, y:4, z:5Point one’s dimensions after increment are:x:3, y:5, z:6Point two’s dimensions before increment are:x:7, y:1, z:3Point two’s dimensions after increment are:x:7, y:1, z:3Please note in case of post increment, the operator function increments the value; but returns the original value since it is post increment.

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You?re given a simple code for the class Bank Customer. Write the following functions:* Copy constructor* = operator overload* == operator overload* + operator overload (customers? balances should be added up, as an example of joint account between husband and wife)

C++

Topic: Operators

What is overloading unary operator?

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C++

Topic: Operators

What is overloading unary operator?

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