JavaPrograms/CSc2310_Fraction.java at master · SLynne/JavaPrograms · GitHub

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//Stephanie Wyckoff
//7/10/2016
//Fraction
//Fraction Class allows users to create programs which add, divide and scale fractions up or down.

public class Fraction {

		  // Instance variables
	private int numerator;    // Numerator of fraction
	private int denominator;  // Denominator of fraction

	  // Constructors
	public Fraction(int num, int denom) { //am I supposed to call this?

		numerator = num;
		denominator = denom;
	}

	  // Instance methods
	public int getNumerator() {

	//	numerator = num;
		return numerator;
	}

	public Fraction(int numerator){

		this(numerator,1);
	}

	public Fraction(){ //initializes here at new Fraction();

		numerator = 0;
		denominator = 1;
	}

	public int getDenominator() {

		//denominator = denom;
		return denominator;
	}

	public Fraction add(Fraction f) {

		int num = numerator * f.denominator +
				  f.numerator * denominator;
		int denom = denominator * f.denominator;
		return new Fraction(num, denom);
	}


	public Fraction divide(Fraction f){
		 //multiply current fraction by new fraction
		int num = numerator * f.denominator;
		int denom = denominator * f.numerator;

		return new Fraction (num,denom);
	  }

	public String scaleUp(int factor){
		  //multiply numerator by factor
		return ""+(numerator*factor)+"/"+denominator;
	}

	public String scaleDown(int factor){
		  //multiply denominator by factor
	  //check if factor is 0, if zero, warning message, re-input factor
		if(factor != 0){

			return ""+numerator+"/"+(denominator*factor);
		}

		return "WARNING: You have selected an improper scale factor. Please reinput scale factor. ";
	}

	public String scale(int factor, boolean flag){
		  //if flag is true, scale up, else scale down
	  //check if factor is 0, if zero, warning message, re-input factor
		while(factor == 0){

			return "WARNING: You have selected an improper scale factor. Please reinput scale factor. ";
		}

		if(flag == true){

			return scaleUp(factor);
		}
		else{

			return scaleDown(factor);
		}
	}


}