Question

c++ problem:

Implement a class money. You must have friend functions for I/O that overload << and >>. You must have multiple constructors, You must implement a percentage method,+,-, <,>. There is a starting money class in your text.

Example output:

Enter an amount of money: $14.33

Your amount is $14.33

My amount is $10.09

One of us is richer.

You have more money than me.

10% of your money is: $$1.43

$14.33 + $10.09 equals $24.42

$14.33 - $10.09 equals $4.24

Press any key to continue . . .

Answer 1

Here is the code:

#include <iostream>
using namespace std;

class Money
{
    private:
        double money;
    public:
        Money(){}
        Money(double a)
        {
            money = a;
        }
        friend ostream &operator << (ostream &out, const Money &m);
        friend istream &operator >> (istream &in, Money &m);
        friend Money operator %(const Money &m1, const Money &m2);
        friend Money operator +(const Money &m1, const Money &m2);
        friend Money operator -(const Money &m1, const Money &m2);
        friend bool operator <(const Money &m1, const Money &m2);
        friend bool operator >(const Money &m1, const Money &m2);
        double getMoney() const { return money;}
};
ostream &operator <<(ostream &out, const Money &m)
{
    out << m.getMoney();
    return out;
}
istream &operator >> (istream &in, Money &m)
{
    in >> m.money;
    return in;
}
Money operator%(const Money &m1, const Money &k)
{
    return Money(m1.money*k.money/100);
}
Money operator+(const Money &m1, const Money &m2)
{
    return Money(m1.money + m2.money);
}
Money operator-(const Money &m1, const Money &m2)
{
    return Money(m1.money - m2.money);
}
bool operator<(const Money &m1, const Money &m2)
{
    if(m1.money < m2.money) return true;
    else return false;
}
bool operator>(const Money &m1, const Money &m2)
{
    if(m1.money > m2.money) return true;
    else return false;
}
int main()
{
    Money yourmoney, mymoney;
    cout << "Enter amount of your money: ";
    cin >> yourmoney;
    cout << "Enter amount of my money: ";
    cin >> mymoney;

    //Implementation of > operator
    cout<< "One of us is richer." << endl;
    Money m1(yourmoney), m2(mymoney);
    if(m1>m2)
    {
        cout<<"You have more money than me"<<endl;
    }
    else
    {
        cout<<"You have less money than me"<<endl;
    }
    //Implementation of % operator
    //k% of your money is:
    Money k(10);
    cout<< k.getMoney()<< "% of your money is $$"<<(m1%k).getMoney() <<endl;
    //implementation of addition operator
    Money sum = m1 + m2;
    cout<< "$"<<m1.getMoney()<<" + "<< "$"<< m2.getMoney() <<" equals "<<sum.getMoney()<<"$"<<endl;
    //implementation of subtraction operator
    Money sub = m1 - m2;
    cout<< "$"<<m1.getMoney()<<" - "<< "$"<< m2.getMoney() <<" equals "<<sub.getMoney()<<"$"<<endl;
    return 0;
}

//here is the output sample:

//Another sample output: