Write a program that will demonstrate overloading unary operator

Write a program that will demonstrate overloading unary operator. The program that uses the following properties – class names- test; three integer type private member variables- e,f,g; three public member function getdata(int x, int y, int z), display(), operator-(). Function getdata(-50, 88, -19) assigns the values for e, f, g; operator-() changes the sign of the value of the object. display() member function displays the result as output before change sign and after change sign which is as follows-

S: -50 88 -19

S: 50 -88 19

#include<iostream>

using namespace std;

class test

{

    int e,f,g;

public:

    void getdata(int x,int y,int z);

    void display();

    void operator-();

};

void test::getdata(int x,int y,int z)

{

    e=x;

    f=y;

    g=z;

}

void test::display()

{

    cout<<e<<" "<<f<<" "<<g<<endl;

}

void test::operator-()

{

    e=-e;

    f=-f;

    g=-g;

}

int main()

{

    test  p;

    p.getdata(-50,88,-19);

    cout<<"Before change sign : ";

    p.display();

    -p;

    cout<<"After change sign : ";

    p.display();

    return 0;

}