Question

Modify the Fraction class created previously as follows. Read the entire description (Code at the bottom also using C++ on visual studios)

• 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
    
    Feel free to change the code if needed

    #include <iostream>
    #include <string>
    #include <iomanip>

    using namespace std;

    class Fraction {
    private:
    int numer;
    int denomin;

    public:
    int GetNumerator();
    int GetDenominator();
    Fraction();
    Fraction(int, int);
    void SetNumerator(int);
    void SetDenominator(int);
    void SetFraction(int, int);
    double GetFraction();
    string ToString();
    };

    
    Fraction::Fraction() {
    numer = 0;
    denomin = 1;
    }
    Fraction::Fraction(int numer, int denomin) {
    SetFraction(numer, denomin);
    }
    void Fraction::SetNumerator(int numer) {
    SetFraction(numer, this->denomin);
    }
    void Fraction::SetDenominator(int denomin) {
    SetFraction(this->numer, denomin);
    }
    int Fraction::GetNumerator() {
    return numer;
    }
    int Fraction::GetDenominator() {
    return denomin;
    }

    void Fraction::SetFraction(int numer, int denomin) {
    if (numer < 0 || denomin < 1) {
    this->numer = 0;
    this->denomin = 1;
    }
    else {
    this->numer = numer;
    this->denomin = denomin;
    }
    }

    double Fraction::GetFraction() {
    return (double)numer / (double)denomin;
    }

    string Fraction::ToString() {
    return to_string(numer) + "/" + to_string(denomin);
    }

    int main() {
    Fraction f(1, 2);
    cout << "Fraction: " << f.ToString() << "\n";
    cout << "Numerator: " << f.GetNumerator() << "\n";
    cout << "Denominator: " << f.GetDenominator() << "\n";
    cout << "Fraction value: " << f.GetFraction() << "\n";

    cout << "\n";

    f.SetNumerator(5);
    f.SetDenominator(3);

    cout << "Fraction: " << f.ToString() << "\n";
    cout << "Numerator: " << f.GetNumerator() << "\n";
    cout << "Denominator: " << f.GetDenominator() << "\n";
    cout << "Fraction value: " << f.GetFraction() << "\n";

    cout << "\n";

    f.SetFraction(4, 3);

    cout << "Fraction: " << f.ToString() << "\n";

    cout << "\n";

    f.SetNumerator(4);
    f.SetDenominator(3);

    cout << "Numerator: " << f.GetNumerator() << "\n";
    cout << "Denominator: " << f.GetDenominator() << "\n";
    cout << "Fraction value: " << f.GetFraction() << "\n";

    
    return 0;

    }

Answer 1

#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>

using namespace std;

class Fraction {
private:
int numer;
int denomin;

public:
int GetNumerator();
int GetDenominator();

~Fraction();
Fraction();
Fraction(int);
Fraction(int, int);
Fraction(int, int, int);

// Copy constructor
Fraction(const Fraction &f) {
cout<<" copy constructor is calling\n";
numer = f.numer; denomin = f.denomin;
}

void SetNumerator(int);
void SetDenominator(int);

void SetFraction(int);
void SetFraction(int, int);
void SetFraction(int, int, int);

double GetFraction();

void PrintFraction();

string ToString();
};

Fraction::Fraction() {
numer = 0;
denomin = 1;

}

Fraction::Fraction(int number) {
cout<<"constructor is calling\n";
SetFraction(number);
}

Fraction::Fraction(int numer, int denomin) {
cout<<"constructor is calling\n";
SetFraction(numer, denomin);
}

Fraction::Fraction(int whole, int numer, int denomin) {
cout<<"constructor is calling\n";
SetFraction(whole, numer, denomin);
}

Fraction::~Fraction() {
cout<<"disctructor is calling\n";
numer = 0;
denomin = 1;
cout << "Pause! Press the Enter key to continue.\n";
system("pause");
//cin.get();
cout << "Resuming...\n";
}

void Fraction::SetNumerator(int numer) {
SetFraction(numer, this->denomin);
}
void Fraction::SetDenominator(int denomin) {
SetFraction(this->numer, denomin);
}
int Fraction::GetNumerator() {
return numer;
}
int Fraction::GetDenominator() {
return denomin;
}

void Fraction::SetFraction(int number) {

if(number < 0) {
cout<<"Only positive values allowed.\n";
this->numer = 0;
this->denomin = 1;
}
else {
this->numer = number;
this->denomin = number;
}
}
void Fraction::SetFraction(int numer, int denomin) {

if(denomin==0) {
cout<<"Denominator can be Zero in any fraction because division by zero is undefined.\n";
denomin = 1;
}

if(numer < 0 || denomin < 1) {
cout<<"Only positive values allowed.\n";
this->numer = 0;
this->denomin = 1;
}
else {
this->numer = numer;
this->denomin = denomin;
}
}
void Fraction::SetFraction(int whole, int numer, int denomin) {

if(denomin==0) {
cout<<"Denominator can be Zero in any fraction because division by zero is undefined.\n";
denomin = 1;
}

if(whole < 0 || numer < 0 || denomin < 1) {
cout<<"Only positive values allowed.\n";
this->numer = 0;
this->denomin = 1;
}else {

this->numer = whole*denomin + numer;
this->denomin = denomin;
}
}

double Fraction::GetFraction() {
return (double)numer / (double)denomin;
}

string Fraction::ToString() {
return to_string(numer) + "/" + to_string(denomin);
}

void Fraction::PrintFraction(){
cout<< "Fraction: " << ToString() <<"\n";
}

int main() {

Fraction f(1);
cout << "Fraction: " << f.ToString() << "\n";
cout << "Numerator: " << f.GetNumerator() << "\n";
cout << "Denominator: " << f.GetDenominator() << "\n";
cout << "Fraction value: " << f.GetFraction() << "\n";

cout << "\n";

Fraction f2(2,3,4);
cout << "Fraction: " << f2.ToString() << "\n";
cout << "Numerator: " << f2.GetNumerator() << "\n";
cout << "Denominator: " << f2.GetDenominator() << "\n";
cout << "Fraction value: " << f2.GetFraction() << "\n";
cout << "\n";

Fraction f3(f2);
f3.PrintFraction();
cout << "Numerator: " << f3.GetNumerator() << "\n";
cout << "Denominator: " << f3.GetDenominator() << "\n";
cout << "Fraction value: " << f3.GetFraction() << "\n";

cout << "\n";

f.SetNumerator(5);
f.SetDenominator(3);

cout << "Fraction: " << f.ToString() << "\n";
cout << "Numerator: " << f.GetNumerator() << "\n";
cout << "Denominator: " << f.GetDenominator() << "\n";
cout << "Fraction value: " << f.GetFraction() << "\n";

cout << "\n";

f.SetFraction(4, 3);

cout << "Fraction: " << f.ToString() << "\n";

cout << "\n";

f.SetNumerator(4);
f.SetDenominator(3);

cout << "Numerator: " << f.GetNumerator() << "\n";
cout << "Denominator: " << f.GetDenominator() << "\n";
cout << "Fraction value: " << f.GetFraction() << "\n";

return 0;

return 0;

}

Note: In linux we need use 'cin.get()' instead of system("pause") because it's works only in windows.