Question

First lab: Create a Fraction class

• Create member variables to store
  • numerator
  • denominator
  • no additional member variable are allowed
• Create accessor and mutator functions to set/return
  • numerator
  • denominator
• Create a function to set a fraction
• Create a function to return a fraction as a string ( common name ToString(), toString())  in the following format: 2 3/4
  • use to_string() function from string class to convert a number to a string; example return to_string(35)+ to_string (75) ; returns 3575 as a string
• Create a function to print the fraction by calling your ToString() function
• Only positive values allowed; a fraction cannot be negative
• Mutator functions do not ask the user for an input; in other words, no interactive input from a user
• Call SetFraction(...) in SetDenominator and SetNumerator functions; this way all your error checking will be only in one function
• Do not forget error checking in mutators functions; if values are invalid, set the fraction to 0/1
• All function definitions must be outside of the class with the exception of functions with one line of code
• Create a client program and test all accessor and mutator functions

Modify the Fraction class created in the first lab above as follows. Read the entire description before writing any code

• Avoid redundant code
• member variables
  • numerator & denominator only
  • do not add any member variables
• Set functions
  • set numerator
  • set denominator
  • set fraction with one argument
  • set fraction with two arguments
  • set fractions with three arguments (whole, numerator, denominator)
  • to avoid redundancy and have error checking in one place only, call setFractions with three arguments in all other set functions
• Create constructors
  • default
  • one argument
  • two argument
  • three argument
  • copy constructor
  • to avoid redundancy and have error checking in one place only, call setFractions with three arguments in all other set functions
• Create a destructor
  • The destructor should set numerator and denominator to 0/1
• Create a function to return a fraction as a string ( common name ToString(), toString())  in the following format: 2 3/4
  • use to_string() function from string class to convert a number to a string; example return to_string(35)+ to_string (75) ; returns 3575 as a string
• Create a function to print the fraction to a console by calling your ToString() function
• Add cout statements to the constructors and the destructor so you know when they are being executed
• Add system ("pause") to the destructor so you know when it executes
• Only positive values allowed
• If the denominator is 0 set it to 1 and output an appropriate message
• Do not allow implicit conversion of an int to a Fraction object
• Main
  • your main should adequately test all the functions, constructors and the destructor.

Answer 1

Please find the answer below.
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main.cpp

#include<iostream>
#include<iomanip>

using namespace std;

class Fraction
{
private:

   int numerator, denominator;

public:

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

   Fraction(int a, int b)
   {
       numerator = a;
       denominator = b;
       if(denominator==0){
           cout<<"Error!!! Denominator cannot be zero. Setting it to 1\n";
           denominator = 1;
       }
   }

   Fraction(int whole,int a, int b)
   {
       numerator = whole*b;
       numerator += a;
       denominator = b;
       if(denominator==0){
           cout<<"Error!!! Denominator cannot be zero. Setting it to 1\n";
           denominator = 1;
       }
   }

   void set(int a, int b)
   {
       numerator = a;
       denominator = b;
       if(denominator==0){
           cout<<"Error!!! Denominator cannot be zero. Setting it to 1\n";
           denominator = 1;
       }
   }

   void set(int whole,int a, int b)
   {
       numerator = whole*b;
       numerator += a;
       denominator = b;
       if(denominator==0){
           cout<<"Error!!! Denominator cannot be zero. Setting it to 1\n";
           denominator = 1;
       }
   }

   void setNumerator(int n){
       numerator = n;
   }
   void setDenominator(int d){
       denominator = d;
       if(denominator==0){
           cout<<"Error!!! Denominator cannot be zero. Setting it to 1\n";
           denominator = 1;
       }
   }

   int getNumerator(){
       return numerator;
   }
   int getDenominator(){
       return denominator;
   }
   string toString(){
       int whole = numerator/denominator;
       int num = numerator%denominator;
       string res="";
       if(whole!=0){
           res=to_string(whole)+" "+to_string(num)+"/"+to_string(denominator);
       }else{
           res=to_string(num)+"/"+to_string(denominator);
       }
       return res;
   }
};

int main()
{
   Fraction f(11,4);
   cout<<f.toString()<<endl;

   f.set(11,0);
   cout<<f.toString()<<endl;

   f.set(5,11,12);
   cout<<f.toString()<<endl;

   cout<<"Numerator : "<<f.getNumerator()<<endl;
   cout<<"DeNominator : "<<f.getDenominator()<<endl;

   return 0;

}

output