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The verification of the credit card number is based on the Luhn algorithm: the old IBM engineer Hans Peter Luhn invented in 1954.The patent was applied at that time and is now open to the public domain of knowledge as a standard for international standards organizations: ISO/EC 7812-1.
Starting with the last digit of the card number, the inverse adds the
This article describes the JavaScript implementation of credit card verification method. Share to everyone for your reference. The specific analysis is as follows:
Here the JavaScript version of the credit card verification code, using the Luhn algorithm
function Isvalidcreditcard (type, ccnum) {if (type = = "Vis
Functional Requirements:1. Quota 150002. It can be shown that the handling fee is 5%3 The last day of the month is the bill, write a file4. Record monthly daily consumption flow (no daily consumption)5. Write the repayment for the current periodPython Source code:#!/usr/bin/envpython#encoding=utf-8#author:sihaogongyuan#date:2015-4-13# filename:atm-py#desc:atm-py################################################ #import sysimport Ossys.path.append ('/tmp/python/') importtabimporttime###############
You can use the following PHP function to verify that a card number is a credit card:
function Validatecard ($cardnumber)
{
$cardnumber = preg_replace ("/\d|\s/", "", $cardnumber); # Strip any non-digits
$cardlength = strlen ($cardnumber);
if ($cardlength!= 0)
{
$parity = $cardlength% 2;
$sum = 0;
for ($i = 0; $i
Original question:Recenlty Luba got a credit card and started to use it. Let's consider n consecutive days Luba uses the card.
She starts with 0 in her account.
In the evening of I-th day a transaction AI occurs. If ai > 0, then AI Bourles is deposited to Luba's account. If AI
In the morning of a n days Luba can go to the bank and deposit any positive an integer
money"If chose = = "3":Tmoney=raw_input ("Please input your Amoney of money:")F=open ('/python/atmuser.txt ')For C in F.readlines ():Usermoney=c.split () [1]if int (Usermoney) >int (Tmoney):Sert=int (Usermoney)-int (Tmoney)USERMONEY=STR (SERT)For line in Fileinput.input ('/python/atmuser.txt ', inplace=1):Line =line.replace (C.split () [1],usermoney)Print line,If chose = = "4":Amoney=raw_input ("Please input add your Amoney of money:")F=open ("/python/atmuser.txt")For C in F.readlines ():Usermo
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