#include<cmath>
#include<iostream>
using namespace std;
class Money
{
public:
	Money();
	Money(double amount);
	Money(int theDollars,int theCents);
	Money(int theDollars);
	friend istream& operator >>(istream& inputstream,Money& amount);
	friend ostream& operator <<(ostream& outputstream,Money& amount);
	friend const bool operator >(const Money& amount1,const Money& amount2);
	friend const bool operator >=(const Money& amount1,const Money& amount2);
	friend const bool operator <(const Money& amount1,const Money& amount2);
	friend const bool operator <=(const Money& amount1,const Money& amount2);
	const Money percent(int percentfigure);
	double getAmount()const{return dollars+cents*0.01;}
	int getDollars()const{return dollars;}
	int getCents()const{return cents;}
private:
	int dollars;
	int cents;
	int dollarspart(double amount)const;
	int centspart(double amount)const;
	int round(double number)const;
};
int main()
{
	Money youramount,myamount;
	cout<<"And my acount is: ";
	cin >>myamount;
	myamount.percent(10);
	cout<<myamount.getDollars();
	cout<<"After 10 percents,My amount is changed to"<<myamount;
	return 0;
}
Money::Money():dollars(0),cents(0){}
Money::Money(double amount):dollars(dollarspart(amount)),cents(centspart(amount)){}
Money::Money(int theDollars,int theCents):dollars(theDollars),cents(theCents){}
Money::Money(int theDollars):dollars(theDollars),cents(0){}
istream& operator >>(istream& inputstream,Money& amount)
{
	char dollarsign;
	double doubledollar;
	inputstream>>dollarsign;
	if(dollarsign!='$')
	{
		cout<<"No dollar sign in Money input.";
		exit(1);
	}
	inputstream>>doubledollar;
	amount.dollars=amount.dollarspart(doubledollar);
	amount.cents=amount.centspart(doubledollar);
	return inputstream;
}
ostream& operator <<(ostream& outputstream,Money& amount)
{
	int absdollars=abs(amount.dollars),abscents=abs(amount.cents);
	if(amount.dollars<0||amount.cents<0)
		outputstream<<"$-";
	else
		outputstream<<"$";
	outputstream<<absdollars;
	if(abscents<10)
		outputstream<<".0"<<abscents;
	else
		outputstream<<"."<<abscents;
	return outputstream;
}
const bool operator >(const Money& amount1,const Money& amount2)
{
	double sumamount1=amount1.dollars+amount1.cents*0.01,
		sumamount2=amount2.dollars+amount2.cents*0.01;
	if(sumamount1>sumamount2)
		return true;
	else
		return false;
}
const bool operator >=(const Money& amount1,const Money& amount2)
{
	double sumamount1=amount1.dollars+amount1.cents*0.01,
		sumamount2=amount2.dollars+amount2.cents*0.01;
	if(sumamount1>=sumamount2)
		return true;
	else
		return false;
}
const bool operator <(const Money& amount1,const Money& amount2)
{
	double sumamount1=amount1.dollars+amount1.cents*0.01,
		sumamount2=amount2.dollars+amount2.cents*0.01;
	if(sumamount1<sumamount2)
		return true;
	else
		return false;
}
const bool operator <=(const Money& amount1,const Money& amount2)
{
	double sumamount1=amount1.dollars+amount1.cents*0.01,
		sumamount2=amount2.dollars+amount2.cents*0.01;
	if(sumamount1<=sumamount2)
		return true;
	else
		return false;
}
const Money Money::percent(int percentfigure)
{
	double doubleamount=(dollars+cents*0.01)*percentfigure/100.0;
	dollars=dollarspart(doubleamount);
	cents=centspart(doubleamount);
	return Money(dollars,cents);
}
int Money::dollarspart(double amount)const
{
	return static_cast<int>(amount);
}
int Money::centspart(double amount)const
{
	double doublecents=amount*100;
	int intcents=(round(fabs(doublecents)))%100;
	if(doublecents<0)
		intcents=-intcents;
	return intcents;
}
int Money::round(double number)const
{
	return static_cast<int>(floor(number+0.5));
}