Implement examples of naming variables, functions, and classes using 3 different

ID: 3838758 • Letter: I

Question

Implement examples of naming variables, functions, and classes using 3 different languages.

Your program must include examples of:
1. global variable(s)
2. function(s) - show how local, nonlocal, and global variables can work together
3. class(es) -
  a. some fields.
  b. some methods

Your program must use all of the above examples.
You must write your program in 3 different languages.
One language must have a complete working and tested implementation,
while the other two should be as close to working as you can make
them.

You must choose one language from the following three groups:
Group 1:
  1. Java
  2. C++
  3. C
Group 2:
  1. python
  2. javascript
Group 3:
  any other language not in group 1 or group 2
  You are encouraged, but not required, to choose
  a functional programming language for your
  third language.

3. Ruby

------------------------------------------------------------------------------------------------------------

What I so far:
This program in C++ should tell me the

amount of pie left (in fraction)

after a certain amount has been taken off.

Use a fraction that has numerator and denominator

DESIGN:

I will have a class called Fraction

contains integers numerator and numerator

that will call a function gcd

Another function called simplify that lowers

the fraction into simplest form by calling the

gcd to determine the gcd of the denominator.

a function called add fraction subtracts the amount

taken off and return the answer as the remainder of pie I have left

--------------------------------------------------------------------------

C++ code:

using namespace std;
// Required Class
class Fraction
{
private:
int numerator;
int denominator;
double pieTaken;
double remainPie;
public:
//public methods
Fraction();
double simplify();
int gcd(int num, int denom);
void setValue(int num, int denom);

cout << "Remaining Pie: " << remainPie;
cout << endl;
}

}

int main() {
bool isValid = true;
int num, denom;
Fraction frac;
do{
// Get values for numerator and denominator
cout << " Enter the numerator value of fraction: ";
cin >> num;
cout << "Enter the denominator value of fraction: ";
cin >> denom;
if (num < 0 || denom < 0){ // If either value is negative
isValid = false;
cout << " The numerator and denominator must be some positive values. Please try again!";
cout << endl;
}
if (denom == 0){ // If denominator is 0
isValid = false;
cout << " Denominator cannot be 0! Please try again!";
cout << endl;
}
cout << endl;
}while(isValid);

frac.setValue(num, denom);
cout << endl;
return 0;

}

Please help review this and do it in Javascript and Ruby for me. Thanks

Explanation / Answer

Solution:

Run in JsFiddle

HTML:

<title>Fraction</title>
<script src="script.js"></script>
<body>
</body>

JAVASCRIPT

C++ Code:

#include<iostream>
using namespace std;
// Required Class
class Fraction
{
private:
int numerator;
int denominator;
double pieTaken;
double remainPie;
public:
//public methods
Fraction();
double simplify();
int gcd(int num, int denom);
void setValue(int num, int denom);

};
// Constructor to assign default values to the data members
Fraction::Fraction(){
pieTaken = 0.0;
remainPie = 100.0;
}
// simplify() function to lower the fraction into simplest form
double Fraction:: simplify(){
double frac = 0.0;
int divisor = gcd(numerator, denominator);
numerator = numerator / divisor;
denominator = denominator / divisor;
frac = (double)numerator / (double)denominator;
return frac;
}
// gcd() function to calculate the greatest common divisor using EUCLIDEAN ALGORITHM
int Fraction::gcd(int num, int denom){
int greatDiv; // To store the greatest common divisor
int rem;
if (num == 0)
greatDiv = denom;
else if (denom == 0)
greatDiv = num;
else{
rem = num % denom;
greatDiv = gcd(denom, rem);
}
return greatDiv;
}
// setValue() function to assign user given values to numerator and denominator and calculate remainPie.
void Fraction:: setValue(int num, int denom){
numerator = num;
denominator = denom;
pieTaken = simplify();
cout << " Portion of the Pie taken out: " << pieTaken;
cout << endl;
if (pieTaken > remainPie){
cout << "You are trying to take our more than what is available!";
exit(0);
}
else{
remainPie = remainPie - pieTaken;
cout << "Remaining Pie: " << remainPie;
cout << endl;
}
}
int main() {
bool isValid = true;
int num, denom;
Fraction frac;
do{
isValid=true;
// Get values for numerator and denominator
cout << " Enter the numerator value of fraction: ";
cin >> num;
cout << "Enter the denominator value of fraction: ";
cin >> denom;
if (num < 0 || denom < 0){ // If either value is negative
isValid = false;
cout << " The numerator and denominator must be some positive values. Please try again!";
cout << endl;
}
if (denom == 0){ // If denominator is 0
isValid = false;
cout << " Denominator cannot be 0! Please try again!";
cout << endl;
}
cout << endl;
}while(!isValid);
frac.setValue(num, denom);
cout << endl;
system("pause");
return 0;
}

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