CSc2310_myFractionScale.java

import java.util.Scanner;
public class myFractionScale {
	//Stephanie Wyckoff
	//7/10/2016
	//FractionScale
	//prompts user for a fraction and a scale factor, scales the fraction up or down by the factor per the users input. Prompts user for another fraction to divide by and 
	//prints out the quotient. User may enter spaces before or after the integer parts if they wish.



	
		public static int findNum(String input){
			int dash = input.indexOf('/');
				
			String temp = input.substring(0, dash);
			return Integer.parseInt(temp); //Returns string converted to int
		}
			
		public static int findDen(String input){
			int dash = input.indexOf('/');
			
			String temp = input.substring(dash + 1, input.length());
			return Integer.parseInt(temp); //Returns string converted to int
		}
		
		public static void main(String[] args){
			
			Scanner input = new Scanner(System.in);
			
			int scale;
			int factor;
			
			System.out.println("Enter a fraction: "); 
			
			String frac = input.nextLine(); //works fine here but I copied it to the section below (with updated variable names) and it doesnt work?
			
			frac = frac.replaceAll("\\s", ""); //This removes any spaces given by the user
					
			Fraction frac1 = new Fraction(findNum(frac), findDen(frac)); //Creates new Fraction object

			frac1.getNumerator();
			
			frac1.getDenominator();
			
					
			
			System.out.print("\nScale up or down (1: up, 0: down): "); 
			scale = input.nextInt();
			
			while(scale != 1 && scale != 0){
				System.out.println("Please enter either a 1 to scale up or 0 to scale down. ");
				scale = input.nextInt();
			}
			
			System.out.print("\nEnter a scale factor: ");
			factor = input.nextInt();
				
			if(scale == 1){
				
				while(factor == 0){
					System.out.println("\n"+frac1.scale(factor, true));
					factor = input.nextInt();
				}
				
				System.out.print("\nThe scaled fraction is: " + frac1.scale(factor, true));
			}
			else if(scale == 0){
				
				while(factor == 0){
					System.out.print("\n"+frac1.scale(factor, false));
					factor = input.nextInt();
				}
				
				System.out.print("\nThe scaled fraction is: " + frac1.scale(factor, false));
			}
			
			System.out.println("\n\nEnter a fraction to divide by: ");
			Scanner scan = new Scanner(System.in);
			String newFrac = scan.nextLine(); //throws string index out of range: -1, if i use nextLine, but should be same as above right? Works with .next as long as no spaces
			
			newFrac = newFrac.replaceAll("\\s", ""); //Only replacing first set of spaces because of the next vs nextLine above, throws out of bounds exception

			Fraction frac2 = new Fraction(findNum(newFrac), findDen(newFrac)); //Creates new Fraction object
			
					
			Fraction quotient = frac1.divide(frac2);
			
			System.out.println("\nThe quotient of the fractions is: " + quotient.getNumerator() + "/" + quotient.getDenominator());
			
			
			
		}
	}