Write a class to represent Rational numbers. What to submit: 3 files: Rational.h

Question

Write a class to represent Rational numbers.
What to submit:

3 files:

Rational.h - class declaration

Rational.cpp – class function definitions

main.cpp - main program that tests the class

Class Rational specifications:

Private data members: 2 integer fields representing the numerator and denominator of the Rational number

Public member functions:

default constructor: Sets the Rational number to 0/1

constructor receiving size: If the denominator is 0, set the Rational number to be 0/1, otherwise, store the 2 parameter values into the numerator and denominator fields and reduce the fraction to its simplest form.

setNumerator: receives a parameter value, stores it to the numerator field, and then reduces the fraction.

setDenominator: receives a parameter value. If the parameter is 0, do nothing. Otherwise, store the parameter value to private data and reduce the fraction.

getNumerator: Return a copy of the numerator field.

getDenominator: Return a copy of the denominator field.

floatVal: Returns the floating point equivalent of the fraction operators:   

+, -, *, / : all operate on two Rational numbers and return the calculated reduced result.

  >, <, >=, <=, ==, != : all operate on two Rational numbers and return a boolean true or

false value based on the comparison.   

++ : both prefix and postfix versions. Adds 1 to the Rational number and returns a

Rational number that is either the original or the

changed version depending on which way it is used.

   << : writes out the Rational number in fraction form (i.e. 3 / 4 )

Private member function:

reduce : reduces the Rational number (numerator and denominator) to the simplest form.

Main program:

Declare at least 2 objects of Rational type. Test all of the class functions and show the testing results in the output console window.

Explanation / Answer

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  134  135  136  137  

  #include <iostream>    using namespace std;    class rational  {  public:          void output(ostream& out);          void set(short num, short den);          void set(short integer);            short get_numerator();          short get_denominator();          rational add(rational number);          rational add(short number);          rational sub(rational number);          rational sub(short number);          rational mul(rational number);          rational mul(short number);          rational div(rational number);          rational div(short number);          rational neg();    private:          short numerator;          short denominator;  };    int main()  {          char loop = 'y';          do          {                  rational rational1, rational2;                  cout << "Input the numerator and denominator: ";                  short num, den;                  cin >> num >> den;                  rational1.set(num, den);                  cout << "Input the numerator and denominator: ";                  cin >> num >> den;                  rational2.set(num, den);                    cout << "What would you like to do? "                           << "1) add "                           << "2) subtract "                           << "3) multiply  ";                  char choice;                  cin >> choice;                  while(choice != '1' && choice != '2' && choice != '3')                  {                          cout << "Invalid choice. What would you like to do? "                                   << "1) add "                                   << "2) subtract "                                   << "3) multiply  ";                          cin >> choice;                  }                    rational result;                                      if(choice == '1')                  {                          result = rational1.add(rational2);                          cout << "The result is: ";                          result.output(cout);                  }/*                  else if(choice == '2')                  {                          result = rational1.sub(rational2);                          cout << "The result is: ";                          result.output(cout);                  }                  else if(choice == '3')                  {                          result = rational1.mul(rational2);                          cout << "The result is: ";                          result.output(cout);                  }*/                    cout << "Would you like to run the program again? (y/n)? ";                  cin >> loop;                  loop = tolower(loop);                  while(loop != 'y' && loop != 'n')                  {                          cout << "Incorrect output. Would you like to run the program again? ";                          cin >> loop;                  }          }while(loop == 'y');            cout << "Press a key to exit: ";          char exit;          cin >> exit;            return 0;  }    void rational::output(ostream& out = cout)  {          out << numerator << "/" << denominator;  }    void rational::set( short num, short den)  {          numerator = num;          denominator = den;  }    void rational::set( short integer)  {          numerator = integer;          denominator = 1;  }    short rational::get_denominator()  {          return denominator;  }    short rational::get_numerator()  {          return numerator;  }      rational rational::add(rational number)  {          numerator = numerator*number.denominator + denominator*number.numerator;          denominator = denominator*number.denominator;  }    rational rational::add(short integer)  {          numerator = numerator + integer*denominator;          rational result;          result.set(numerator, denominator);          return result;  }  

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