!/usr/bin/env python

coding:utf-8

计算结果百位500向下取整，（0-499取000，500-999取500)

import math

calc_Amount = float(input("输入所有可需金额："))

act_Amount = calc_Amount

if calc_Amount > 0:

value2 = calc_Amount / 1000

value3 = math.floor(value2)

if (value2 - value3) < 0.5 and (value2 - value3) >= 0:

result = value31000

else:

result = (value3+0.5)1000

print(result)

else:

print(str(calc_Amount)+"数字有问题")

Java编写

package org.learn.JavaLearn;

import java.lang.Math;

public class CalcBTXYApp {

public static void main(String[] agrs){

// calc500round(11999.00);

// thirdjinwei(111.0922);

// applyrepayeach(5000,0.007,3);

CalcBTXYApp calcBTXYApp =new CalcBTXYApp();

System.out.println(calcBTXYApp.applyrepayeach(5000,0.007,3));

}

public  double applyrepayeach(double applyAmount,double fee,int qishu){

    double Amount =applyAmount;

    double repayeach;

    repayeach = thirdjinwei(Amount/qishu) + thirdjinwei(Amount*fee);

// System.out.println("借款申请页每月应还:"+repayeach);

return repayeach;

}

public  double newRepayeach(double creditAmount,double baoxianfee,double fee,int qishu){

 double rebaoxian ;

 double newLoanAmount;

 double newbaoxian;

 double Amount;

 double nowrepayeach;

    rebaoxian =Math.floor(creditAmount*baoxianfee);

    newLoanAmount = calc500round(creditAmount-rebaoxian);

    newbaoxian = Math.floor(newLoanAmount*baoxianfee);

    Amount = newLoanAmount+newbaoxian;

    nowrepayeach =thirdjinwei(thirdjinwei(Amount/qishu)+thirdjinwei(Amount*fee));

// return Amount;

return nowrepayeach;

}

public  double thirdjinwei(double amount){

    amount = amount*1000;

    amount = Math.floor(amount);

    amount = amount/10;

    amount = Math.ceil(amount);

    amount = amount/100;

// System.out.println(amount);

return amount;

}

public  double calc500round(double calc_Amount){

    double act_Amount;

    double value2;

    double value3;

    double result=0;

    act_Amount = calc_Amount;

    if (calc_Amount>0){

        value2 = calc_Amount/1000;

        value3 = Math.floor(value2);

        if ((value2-value3)<0.5 &&(value2-value3)>=0){

            result = value3*1000;

        }else {

            result = (value3+0.5)*1000;

        }

// System.out.println(result);

//return result;

}else {

System.out.println(calc_Amount+"金额数字有问题");

}

return result;

}

}