分数加减法

雨点打透心脏的1/2处 2021-09-27 17:46 412阅读 0赞

import java.util.*;
    
    public class Main {
    
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		while (scanner.hasNext()) {
    			String formula = scanner.nextLine();
    			char num[] = formula.toCharArray();
    			Fraction aFraction = new Fraction(num[0] - '0', num[2] - '0');
    			Fraction bFraction = new Fraction(num[4] - '0', num[6] - '0');
    			FractionCalculate fractionCalculate = new FractionCalculate(aFraction, bFraction);
    			if (num[3] == '+') {
    				Fraction cFraction = fractionCalculate.add();
    				System.out.println(cFraction.toString());
    			} else if (num[3] == '-') {
    				Fraction cFraction = fractionCalculate.less();
    				System.out.println(cFraction.toString());
    			}
    		}
    
    	}
    }
    
    class Fraction {
    	int numerator; // 分子
    	int denominator; // 分母
    
    	public Fraction() {
    		super();
    	}
    
    	public Fraction(int numerator, int denominator) {
    		super();
    		this.numerator = numerator;
    		this.denominator = denominator;
    	}
    
    	public int getNumerator() {
    		return numerator;
    	}
    
    	public void setNumerator(int numerator) {
    		this.numerator = numerator;
    	}
    
    	public int getDenominator() {
    		return denominator;
    	}
    
    	public void setDenominator(int denominator) {
    		this.denominator = denominator;
    	}
    
    	void simplify() {
    		if (numerator == 0) {
    			return;
    		}
    		while (denominator % numerator == 0) {
    			int num = denominator / numerator;
    			denominator /= num;
    			numerator /= num;
    		}
    	}
    
    	public String toString() {
    		if (numerator == 0) {
    			return "0";
    		} else if (numerator < 0 || denominator < 0) {
    			return "-" + Math.abs(numerator) + "/" + Math.abs(denominator);
    		} else
    			return numerator + "/" + denominator;
    	}
    
    }
    
    class FractionCalculate {
    	Fraction a = new Fraction();
    	Fraction b = new Fraction();
    
    	public FractionCalculate(Fraction a, Fraction b) {
    		super();
    		this.a = a;
    		this.b = b;
    	}
    
    	Fraction add() {
    		Fraction c = new Fraction();
    		c.setNumerator(a.getDenominator() * b.getNumerator() + a.getNumerator() * b.getDenominator());
    		c.setDenominator(a.getDenominator() * b.getDenominator());
    		c.simplify();
    		return c;
    	}
    
    	Fraction less() {
    		Fraction c = new Fraction();
    		c.setNumerator(a.getDenominator() * b.getNumerator() - a.getNumerator() * b.getDenominator());
    		c.setDenominator(a.getDenominator() * b.getDenominator());
    		c.simplify();
    		return c;
    	}
    }

代码错误，目前未改正