package com.hxzkoa.util;

import java.math.BigDecimal;

public class CalculatorUtil {
	/**
	 * C：向上取整；I：向下取整；R：四舍五入
	 * @param m
	 * @param k,此处运算要使用BigDecimal，否则float或double会出现精度丢失， 
	 * @param qzms
	 * @return
	 */
	public static Integer multiRound(String m,String newBl,String bl,String qzms){
		return multiRound(new BigDecimal(m),new BigDecimal(newBl),new BigDecimal(bl),qzms);
	}
	public static Integer multiRound(BigDecimal m,BigDecimal newBl,BigDecimal bl,String qzms){
		Integer total=0;
		switch (qzms){
			case "C":
				total=(int) Math.ceil(m.multiply(newBl).divide(bl).doubleValue());
				break;
			case "I":
				total=(int) Math.floor(m.multiply(newBl).divide(bl).doubleValue());
				break;
			case "R":
				total=(int) Math.round(m.multiply(newBl).divide(bl).doubleValue());
				break;	
			default:
				total=0;
		}
		return total;
	}
	public static void main(String[] args) {
		System.out.println(CalculatorUtil.multiRound("30","105","100","R"));
	}
}