HELP: Rational Number Class - Overloading the comparison, insertion & extraction operators

faizdar (2)
For this program, I have to write a class for Rational Number and do the following:

1) Two data members to store numerator and denominator.

2) Overloaded constructors (by default a rational number should be initialized to 1/1).

3) A reduce() method to store the rational number in the simplest form.

4) Operator overloading for (+, *, /, ==, >).

5) Operator overloading for stream insertion (<<) & extraction (>>) operators.

I am having problems with the operator overloading of ==, >, << and >>. If anyone can help me with this I would really appreciate it.

Here's what I have come up with:

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#include<iostream>
#include<conio.h>
using namespace std;

class rational
{
	int n,d;
public:
	rational() : n(1), d(1) {};
	~rational(){};
	
	void getData()
	{
		cout<<"\nEnter a numerator: ";
		cin>>n;
		cout<<"Enter a denominator: ";
		cin>>d;
		cout<<endl;

		while(d==0)
		{
			cout<<"Please enter a denominator: ";
			cin>>d;
		}

		while(d<0)
		{
			n *= -1;
			d *= -1;
		}
	}

int GCD(int n1, int remainder)
{
	if(remainder==0)
		return(n1);
	else { return(GCD(remainder,n1%remainder)); }
}

void reduce(int &n,int &d)
{
	int rdc = 0;
	if(d>n)
		rdc = GCD(d,n);
	else if(d<n)
		rdc = GCD(n,d);
	else
		rdc = GCD(n,d);
	n /= rdc;
	d /= rdc;
	cout<<"\nAfter operating the rational numbers are: "<<n<<"/"<<d<<endl;
}

void operator +(rational c1)
{
rational temp;
temp.n=(n*c1.d)+(c1.n*d);
temp.d=c1.d*d;
reduce(temp.n,temp.d);
}

void operator -(rational c1)
{
rational temp;
temp.n=(n*c1.d)-(c1.n*c1.d);
temp.d=c1.d*d;
reduce(temp.n,temp.d);
}

void operator *(rational c1)
{
rational temp;
temp.n=n*c1.n;
temp.d=d*c1.d;
reduce(temp.n,temp.d);
}

void operator /(rational c1)
{
rational temp;
temp.n=n*c1.d;
temp.d=d*c1.n;
if(temp.d<0)
{
	temp.n *= -1;
	temp.d *= -1;
}
reduce(temp.n,temp.d);
}

};

int main()
{
	rational c1, c2;
	int n;

	cout<<"Enter the data for the first fraction: ";
	c1.getData();
	cout<<"Enter the data for the second fraction: ";
	c2.getData ();

	cout<<"1 . Addition of the two fractions"<<endl;
	cout<<"2 . Subtraction of the two fractions"<<endl;
	cout<<"3 . Multiplication of the two fractions"<<endl;
	cout<<"4 . Division of the two fractions"<<endl;
	cout<<"\nEnter your choice: ";
	cin>>n;
	switch(n)
	{
		case 1:
			c1+c2;
			getch();
			break;
		case 2:
			c1-c2;
			getch();
			break;
		case 3:
			c1*c2;
			getch();
			break;
		case 4:
			c1/c2;
			getch();
			break;
		default:
			cout<<"Invalid choice."<<endl;
		return 0;
	}

getch();
return 0;
}


ps: I have already taken some help from this forum regarding the reduce function. So, thanks a lot for that :)
Last edited on
faizdar (2)
I have absolutely no idea how, in my case, operator overloading is done of these operators ==, >, <<, >>. I have read about them on this forum but am still unable to use them in this program :( If anyone can provide me the code for these I'd be really grateful!

is this what i am supposed to do?

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void operator ==(rational c1)
{
rational temp;
temp.n=(n==c1.n);
temp.d=(d==c1.d);
cout<<"\nAfter operating the rational numbers are: "<<temp.n<<"/"<<temp.d<<endl;
}
Last edited on
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