How to write a program to find difference between height of 2 person using PORO (Passing Object and Return Object)?

CODE

How to write a program to find difference between height of 2 person?

//Method -1

#include<iostream>

using namespace std;

class hgt

{

    float f,i;

    public:

    void setValue(float f1,float i1)

    {

        f=f1;

        i=i1;

    }

    hgt pro(hgt h2)

    {

        hgt h3;

        h3.f=f-h2.f;

        h3.i=i-h2.i;

        if(h3.f<0)

            h3.f*=(-1);

        if(h3.i<0)

            h3.i*=(-1);

        return h3;

    }

    void show()

    {

        cout<<f<<" "<<i;

    }

};

int main()

{

    float f1,f2,i1,i2;

    hgt h1,h2,h3;

    cout<<"enter first height:";

    cin>>f1>>i1;

    h1.setValue(f1,i1);

    cout<<"enter second height:";

    cin>>f2>>i2;

    h2.setValue(f2,i2);

    h3=h1.pro(h2);

    cout<<"\n difference of height:";

    h3.show();

}

Output:

enter first height:12

45

enter second height:63

59

 difference of height: 51  14

//Method -2

#include<iostream>

using namespace std;

class hgt

{

    float f,i;

    public:

    void setValue(float f1,float i1)

    {

        f=f1;

        i=i1;

    }

    hgt pro(hgt h2)

    {

        hgt h3;

        h3.f=f-h2.f;

        h3.i=i-h2.i;

        if(h3.f<0)

            h3.f*=(-1);

        if(h3.i<0)

            h3.i*=(-1);

        return h3;

    }

    float show1()

    {

        return f;

    }

    float show2()

    {

        return i;

    }

};

int main()

{

    float f1,f2,i1,i2;

    hgt h1,h2,h3;

    cout<<"enter first height:";

    cin>>f1>>i1;

    h1.setValue(f1,i1);

    cout<<"enter second height:";

    cin>>f2>>i2;

    h2.setValue(f2,i2);

    h3=h1.pro(h2);

    cout<<"\n difference of height:"<<h3.show1()<<" "<<h3.show2();

}

Output:

enter first height:56

12

enter second height:79

3

 difference of height:23 9