使用会员卡消费算法

来源：互联网发布：淘宝crm解决方案论文编辑：程序博客网时间：2024/04/27 17:12

代码：

package com.pan.domain;import java.text.DecimalFormat;import java.text.ParseException;public class AverageCalc {/** * @param args * @throws ParseException  */public static void main(String[] args) throws ParseException {//总金额 500//本金 600.6//赠送金额 300.5double a=600.6d;double b=100.5d;double sum=a+b;double temp1=a/sum;double temp2=b/sum;System.out.println(temp1);System.out.println(temp2);System.out.println("比例：");int percent1=(int)(temp1*100);int percent2=(int)(temp2*100);System.out.println(percent1+"% - "+percent2+"%");double value1=500*temp1;double value2=500*temp2;System.out.println("结果：");System.out.println(value1+" - "+value2);DecimalFormat format=new DecimalFormat("#.00");System.out.println("保留两位小数");System.out.println(format.format(value1)+" - "+format.format(value2));value1=Double.parseDouble(format.format(value1));value2=Double.parseDouble(format.format(value2));System.out.println("误差：");System.out.println(500-(value1+value2));Double ad=0d;Double bd=0d;System.out.println(ad.equals(bd));}}

输出结果：

0.85665382969619170.1433461703038083比例：85% - 14%结果：428.3269148480959 - 71.67308515190415保留两位小数428.33 - 71.67误差：0.0true