oops 4: a, b,c,d

// friend func.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>

using namespace std;


class abc;

class xyz
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void swap(abc, xyz);
};


class abc
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void swap(abc, xyz);
};



void swap(abc ab, xyz xy)
{
    cout<<"\nabc contains"<<ab.a;
    cout<<"\nxyz contains"<<xy.a;

    int temp;
    temp=ab.a;
    ab.a=xy.a;
    xy.a=temp;

    cout<<"\n\nafter swapping\n";
    cout<<"\nabc contains"<<ab.a;
    cout<<"\nxyz contains"<<xy.a<<endl;

}



int _tmain(int argc, _TCHAR* argv[])
{
    abc a;
    xyz x;
     a.enter();
     x.enter();
     swap(a,x);
     system("pause");

    return 0;
}

/*
enter the value8
enter the value9

abc contains8
xyz contains9

after swapping

abc contains9
xyz contains8
Press any key to continue . . .
*/





//fourth program
// friend func.cpp : Defines the entry point for the console application.


#include "stdafx.h"
#include<iostream>

using namespace std;


class professor;

class bank
{
    double monthly;
    char gender;
public:
    void enter()
    {
        cout<<"enter the gender for bank class";
        cin>>gender;
        cout<<"Enter monthly salary";
        cin>>monthly;

    }

    friend  void calc(bank, professor);
};


class professor
{

    double monthly;
    char gender;
public:
    void enter()
    {
        cout<<"\nenter the gender for bank class";
        cin>>gender;
        cout<<"Enter monthly salary";
        cin>>monthly;

    }

    friend  void calc(bank, professor);
};



void calc(bank b, professor p)
{

    double gross_bank=b.monthly*12;
    double gross_prof=p.monthly*12;

    double net_b, net_p;
//handle bank class
    if(b.gender=='f' || b.gender=='F')
    {
        net_b=gross_bank-190000;
    }
    else
    {
            net_b=gross_bank-180000;
    }

    if(net_b>1000000)
        cout<<"\nIncome tax for bank class is "<<net_b*0.3;
    else if(net_b>500000)
        cout<<"\nIncome tax for bank class is "<<net_b*0.2;
    else if(net_b>300000)
        cout<<"\nIncome tax for bank class is "<<net_b*0.1;
    else
        cout<<"\nfor bank class, NO tax ";









    //handle prof class
    if(p.gender=='f' || p.gender=='F')
    {
        net_p=gross_prof-190000;
    }
    else
    {
            net_p=gross_prof-180000;
    }

        if(b.gender=='f' || b.gender=='F')
    {
        net_b=gross_bank-190000;
    }
    else
    {
            net_b=gross_bank-180000;
    }

    if(net_p>1000000)
        cout<<"\nIncome tax for professor class is "<<net_p*0.3;
    else if(net_p>500000)
        cout<<"\nIncome tax for professor class is "<<net_p*0.2;
    else if(net_p>300000)
        cout<<"\nIncome tax for professor class is "<<net_p*0.1;
    else
        cout<<"For professor class: no tax";
}



int _tmain(int argc, _TCHAR* argv[])
{
    bank a;
    professor x;
     a.enter();
     x.enter();
     calc(a,x);
     system("pause");

    return 0;
}



/*

enter the gender for bank class f
Enter monthly salary40000

enter the gender for bank class m
Enter monthly salary60000

for bank class, NO tax
Income tax for professor class is 108000
Press any key to continue . . .
*/















// friend func.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>

using namespace std;


class abc;

class xyz
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void average(abc, xyz);
};


class abc
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void average(abc, xyz);
};



void average(abc ab, xyz xy)
{
    float c;
    c=(ab.a+xy.a)/2.0;
    cout<<"Average is"<<c;

}



int _tmain(int argc, _TCHAR* argv[])
{
    abc a;
    xyz x;
     a.enter();
     x.enter();

     average(a,x);
     system("pause");

    return 0;
}

/*
enter the value4
enter the value5
Average is4.5Press any key to continue . . .
*/






















program to find greatest of 2 nos using friend functions
program to find average of 2 nos using friend functions
program to swap 2 nos using friend functions

// friend func.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>

using namespace std;


class abc;

class xyz
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void greatest(abc, xyz);
};


class abc
{
    int a;
public:
    void enter()
    {
        cout<<"enter the value";
        cin>>a;
    }

    friend  void greatest(abc, xyz);
};



void greatest(abc ab, xyz xy)
{
    if (ab.a>xy.a)
        cout<<"greatest is "<< ab.a;
    else if (ab.a<xy.a)
        cout<<"greatest is "<< xy.a;
    else
        cout<<"both equal";
}



int _tmain(int argc, _TCHAR* argv[])
{
    abc a;
    xyz x;
     a.enter();
     x.enter();

     greatest(a,x);
     system("pause");

    return 0;
}



/*
enter the value5
enter the value10
greatest is 10Press any key to continue . . .
*/