Question

Extend class Fraction(codes are on the bottom)

          - add a parameterized constructor

          - overload + and - operators to handle the following:

                   - integer + Fraction

                   - integer - Fraction

                   - Fraction + integer

                   - Fraction - integer

          - use the class in main()

                   - instantiate 2 Fractions using the parameterized constructor

                   - add 2 Fractions

                   - add integer to a Fraction

                   - add Fraction to an integer

                   - subtract Fraction from integer

                   - subtract integer from Fraction

                   - display the results for each like an equation -- use overloaded <<

          No prompting necessary, you can hard code the test values.

          All display is done in main. No displaying by member functions!

#include <string.h>

#include <iostream>

#include <iomanip>

using namespace std;

class Fraction

{

public:

int numerator, denominator;

Fraction(){}

Fraction(int num, int den)

{

numerator = num;

denominator = den;

  

}

  

void setNumerator(int num)

{

numerator = num;

}

  

int getNumerator()

{

return numerator;

}

  

void setDenominator(int den)

{

denominator = den;

}

  

int getDenominator()

{

return denominator;

}

  

  

Fraction operator +(Fraction const &obj)

{

int num = numerator*obj.denominator+denominator*obj.numerator;

int den = denominator*obj.denominator;

return Fraction(num,den);

}

  

Fraction operator -(Fraction const &obj)

{

int num = numerator*obj.denominator-denominator*obj.numerator;

int den = denominator*obj.denominator;

return Fraction(num,den);

}

  

};

ostream & operator << (ostream &out, const Fraction &c)

{

out << c.numerator<<"/"<<c.denominator;

return out;

}

int main()

{

cout<<"Enter numerator and denominator for fraction 1: "<<endl;

int num1, den1, num2, den2;

cin>>num1>>den1;

cout<<"Enter numerator and denominator for fraction 2: "<<endl;

cin>>num2>>den2;

Fraction a;

Fraction b;

a.setNumerator(num1);

a.setDenominator(den1);

b.setNumerator(num2);

b.setDenominator(den2);

cout<<a<<"+"<<b<<"="<<(a+b)<<endl;

cout<<a<<"-"<<b<<"="<<(a-b)<<endl;

return 0;

}

Answer 1

C++ Program:

#include <string.h>
#include <iostream>
#include <iomanip>
using namespace std;
class Fraction
{
public:
int numerator, denominator;
Fraction(){}
Fraction(int num, int den)
{
numerator = num;
denominator = den;

}

void setNumerator(int num)
{
numerator = num;
}

int getNumerator()
{
return numerator;
}

void setDenominator(int den)
{
denominator = den;
}

int getDenominator()
{
return denominator;
}

Fraction operator +(Fraction const &obj)
{
int num = numerator*obj.denominator+denominator*obj.numerator;
int den = denominator*obj.denominator;
return Fraction(num,den);
}

Fraction operator +(int val)
{
Fraction temp(val, 1);
int num = numerator*temp.denominator+denominator*temp.numerator;
int den = denominator*temp.denominator;
return Fraction(num,den);
}

Fraction operator -(Fraction const &obj)
{
int num = numerator*obj.denominator-denominator*obj.numerator;
int den = denominator*obj.denominator;
return Fraction(num,den);
}

Fraction operator -(int val)
{
Fraction temp(val, 1);
int num = numerator*temp.denominator-denominator*temp.numerator;
int den = denominator*temp.denominator;
return Fraction(num,den);
}

// Adding Integer from Fraction
friend Fraction operator+(const int val, const Fraction &c);

// Subtracting Integer from Fraction
friend Fraction operator-(const int val, const Fraction &c);

};

//Implementing function
Fraction operator+(const int val, const Fraction &c)
{
Fraction temp(val, 1);

int num = temp.numerator*c.denominator+temp.denominator*c.numerator;
int den = temp.denominator*c.denominator;

return Fraction(num,den);
}

//Overloading Integer - Fraction
Fraction operator-(const int val, const Fraction &c)
{
Fraction temp(val, 1);

int num = temp.numerator*c.denominator-temp.denominator*c.numerator;
int den = temp.denominator*c.denominator;

return Fraction(num,den);
}

ostream & operator << (ostream &out, const Fraction &c)
{
out << c.numerator<<"/"<<c.denominator;
return out;
}
int main()
{
cout<<"Enter numerator and denominator for fraction 1: "<<endl;
int num1, den1, num2, den2;
cin>>num1>>den1;
cout<<"Enter numerator and denominator for fraction 2: "<<endl;
cin>>num2>>den2;
Fraction a;
Fraction b;

a.setNumerator(num1);
a.setDenominator(den1);
b.setNumerator(num2);
b.setDenominator(den2);
cout<<a<<"+"<<b<<"="<<(a+b)<<endl;
cout<<a<<"-"<<b<<"="<<(a-b)<<endl;

cout<<a<<"+"<<5<<"="<<(a+5)<<endl;
cout<<a<<"-"<<2<<"="<<(a-2)<<endl;

cout<<7<<"+"<<b<<"="<<(7+b)<<endl;
cout<<3<<"-"<<b<<"="<<(3-b)<<endl;

return 0;
}

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Sample Run: