8.17 (Rational Numbers) Create a class called Rational for performing arithmetic with fractions. Write a program to test your class. Use integer variables to represent the private instance variables of the class the numerator and the denominator. Pr
唔，其实里面就是一个工具类，加减乘除、保留两位小数。一共5个方法。。。emmmm.....为啥分这么高呢。因为宝宝想分想疯了。 附代码，有土豪就打赏打赏，没土豪的直接拿去使吧。 package cn.cisdom.base.utils; import java.math.BigDecimal; import java.text.DecimalFormat; public class Calculation { public static final DecimalFormat df = new
