Question

Please use C++ and add comments to make it easier to read.

Do the following:

1) Add a constructor with two parameters, one for the numerator, one for the denominator. If the parameter for the denominator is 0, set the denominator to 1

2) Add a function that overloads the < operator

3) Add a function that overloads the * operator

4) Modify the operator<< function so that if the numerator is equal to the denominator it just prints 1

5) Modify the operator>> function so that after it reads the denominator it sets it to 1 if it is 0

6) Modify the main program so that it tests the 3 functions you created and the 2 functions you modified

#include "Fraction.h"

int main ()

{

Fraction f1,f2,f3;

cout<< "Enter a fraction in the form a/b ";

cin >> f1;

cout<< "Enter another fraction in the form a/b ";

cin >> f2;

if ( f1 == f2 )

cout << "\nThe two fractions are equal\n";

else cout <<"\nThe two fractions are different\n";

f3 = f1 + f2;

cout << f1 << " + " << f2 << " = " << f3;

return 0;

}

#include "Fraction.h"

Fraction :: Fraction()

{

numerator = 0;

denominator = 1;

}

ostream& operator<< ( ostream& ofile, const Fraction &f )

{

ofile<< f.numerator;

ofile<< " / ";

ofile<<f.denominator;

return ofile;

}

istream& operator>> ( istream &ifile, Fraction &f )

{

char ch;

ifile>> f.numerator;

ifile>> ch; // read and discard the symbol /

ifile>> f.denominator;

return ifile;

}

Fraction Fraction :: operator+ ( const Fraction &other)

{

Fraction temp;

temp.numerator = numerator*other.denominator +

denominator*other.numerator;

temp.denominator = denominator * other.denominator;

return temp;

}

bool Fraction :: operator== ( const Fraction &other )

{

return ( numerator*other.denominator ==

denominator*other.numerator);

}

#include <iostream>

using namespace std;

#ifndef FRACTION_H

#define FRACTION_H

class Fraction

{

friend ostream& operator<< (ostream&, const Fraction& );

friend istream& operator>> (istream &, Fraction &);

private:

int numerator;

int denominator;

public:

Fraction();

Fraction operator+ ( const Fraction& );

bool operator== ( const Fraction& );

};

#endif

Answer 1

In case of any query do comment. Please rate answer as well. Thanks

Code:

===========main.cpp==========

#include "Fraction.h"
int main ()
{
int num, den;
Fraction f1,f2,f3,f4,f5;
cout<< "Enter a fraction in the form a/b ";
cin >> f1;
cout<< "Enter another fraction in the form a/b ";
cin >> f2;
if ( f1 == f2 )
    cout << "\nThe two fractions are equal\n";
else 
    cout <<"\nThe two fractions are different\n";

if (f1<f2)
    cout << f1 << " is less than " << f2 << "\n";
else
    cout << f2 << " is less than " << f1 << "\n";

f3 = f1 + f2;
f4 = f1 * f2;
cout << f1 << " + " << f2 << " = " << f3 << "\n";
cout << f1 << " * " << f2 << " = " << f4 << "\n";
//using constructor with parameter
cout << "Using constructor with two parameter: \n";
cout << "Enter numerator: ";
cin >> num;
cout <<"Enter denomerator: ";
cin >> den;
f5 = Fraction(num,den);
cout << "Fraction constructor with two parameter is: " << f5;
return 0;
}

=============Fraction.cpp==========

#include "Fraction.h"

Fraction :: Fraction()
{
numerator = 0;
denominator = 1;
}

Fraction :: Fraction(int num, int den){
    numerator = num;
    if(den == 0)
        denominator = 1;
    else
        denominator = den;
}

ostream& operator<< ( ostream& ofile, const Fraction &f )
{
if(f.numerator == f.denominator)
    ofile << "1";
else
{
    ofile<< f.numerator;
    ofile<< " / ";
    ofile<<f.denominator;
}
return ofile;
}

istream& operator>> ( istream &ifile, Fraction &f )
{

char ch;
ifile>> f.numerator;
ifile>> ch; // read and discard the symbol /
ifile>> f.denominator;
if(f.denominator == 0)
    f.denominator = 1;
return ifile;
}

Fraction Fraction :: operator+ ( const Fraction &other)
{
    Fraction temp;
    temp.numerator = numerator*other.denominator + denominator*other.numerator;
    temp.denominator = denominator * other.denominator;    
    return temp;
}

bool Fraction :: operator== ( const Fraction &other )
{
    return ( numerator*other.denominator ==denominator*other.numerator);
}

bool Fraction :: operator< ( const Fraction &other )
{
    //make denominator same and then compare the difference of numerator  
    int difference = numerator * other.denominator - denominator * other.numerator;
    return difference < 0;
}

//function for multiplication
Fraction Fraction :: operator* ( const Fraction &other)
{
    Fraction temp;
    temp.numerator = numerator*other.numerator;
    temp.denominator = denominator * other.denominator;    
    return temp;
}

============Fraction.h===========

#include <iostream>
using namespace std;
#ifndef FRACTION_H
#define FRACTION_H
class Fraction
{
friend ostream& operator<< (ostream&, const Fraction& );
friend istream& operator>> (istream &, Fraction &);
private:
int numerator;
int denominator;
public:
Fraction();
Fraction(int numerator, int denominator); //constructor with two parameter
Fraction operator+ ( const Fraction& );
bool operator== ( const Fraction& );
bool operator< ( const Fraction&); //added for < operator
Fraction operator* ( const Fraction& ); //added for * operator
};
#endif

output:

input Enter a fraction in the form a/b 2/0 Enter another fraction in the form a/b 2/2 The two fractions are different 1 is less than 2 / 1 2 / 1 + 1 = 6 / 2 12 / 1 - 1 = 4 / 2 Using constructor with two parameter: Enter numerator: 5 Enter denomerator: 7 Fraction constructor with two parameter is: 5 / 7 - - Program finished with exit code 0 Press ENTER to exit console.