js社区，我对javascript比较陌生。我实际上只使用基本功能，循环和条件处理ATM机请求，但是我无法定义在查询，取款和存款后将计算余额的功能。...这是给我问题的代码。
function calculateAmt(inquiry, withdrawal, deposit){
var availableBal = 35000;
var a= inquiry(availableBal);
var b= deposit(availableBal);
var c= withdrawal(availableBal);
if(a){
availableBal = inquiry(availableBal);
}
else if(b){
availableBal = availableBal - withdrawal;
if(withdrawal > availableBal){
alert("You have insufficient funds");
}
}
else{
availableBal = availableBal + deposit;
}
return availableBal;
}
这就是您可以帮助我完成的全部代码。
function atmMachine(){
var NAME = prompt("Enter your name") ;
var passTry = 3;
var BANKNAME = parseInt(prompt("Dear "+ NAME+ " What is your bank name?\n 1. GTB\n2.Access\n3.Stanbic-IBTC\n4.Fidelity\n5.Sterling\n6.Skye\n7.Firstbank\n8.Others"));
var YES_NO = 2;
var passwordEntered = parseInt(prompt("Dear "+NAME+ ", Enter your 4 digits PIN"));
var correct_pass = (/^[0-9]{4}$/);
var min_bal = 1000;
function checkPassword(password){ //to check if the password is correct or not
if(correct_pass.test(passwordEntered)){
optionMenu();
}else{
passTry = 3;
while(!(correct_pass.test(passwordEntered))){
alert("You don't a valid PIN, input the correct one now");
alert("You have only " + passTry + " chances to try");
passTry = passTry - 1;
if (passTry === 0){
alert("Maximum tries exceeded, please contact your bank to retrieve your ATM card");
exit();
break;
}
passwordEntered = parseInt(prompt("Dear "+NAME+ ", Enter your 4 digits PIN"));
}optionMenu();
}
}checkPassword(passwordEntered);
// menu selection
function optionMenu(){
var SELECT_account = parseInt(prompt("Which type of account do you have?\n 1. Savings\n 2. Current\n 3. Credit"));
if(SELECT_account < 4){
var atm_functions = parseInt(prompt("Hello, customer, what can we do for you today ? \n 1. Inquiry \n 2. withdrawal \n 3. Deposit\n4. Exit"));
if(atm_functions==1){
inquiry();
}else if(atm_functions==2){
withdrawal();
}else if(atm_functions==3){
deposit();
}else if(atm_functions==4){
exit();
}
else{
alert("Please make a valid selection");
}
}
}
// to calculate the balance for before, during and after withdrawal and deposit
function calculateAmt(inquiry, withdrawal, deposit){
var availableBal = 35000;
var a= inquiry(availableBal);
var b= deposit(availableBal);
var c= withdrawal(availableBal);
if(a){
availableBal = inquiry(availableBal);
}
else if(b){
availableBal = availableBal - withdrawal;
if(withdrawal > availableBal){
alert("You have insufficient funds");
}
}
else{
availableBal = availableBal + deposit;
}
return availableBal;
}
function inquiry(availableBal){
availableBal = calculateAmt(availableBal);
alert("Your avaialable balance is "+ availableBal);
toContinue();
}
function deposit(availableBal){
var deposit= parseInt(prompt("How much do you want to deposit?"));
if (isNaN(deposit) || deposit === " ") {
alert('Error: please enter a number!');
deposit();
}
deposit = calculateAmt(availableBal);
alert("You have successfully deposited "+deposit+ " ...You now have "+availableBal);
toContinue(availableBal);
}
function withdrawal(availableBal){
var withdrawal= parseInt(prompt("How much do you want to withdraw ? \t The minimum amount you can withdraw is 1000"));
if (isNaN(withdrawal) || withdrawal === " ") {
alert('Error: please enter a number!');
withdrawal(availableBal);
}
withdrawal = calculateAmt(availableBal);
alert("transaction is successful");
alert("Your remaining balance is "+ availableBal);
toContinue();
}
function toContinue(){
var YES_NO = parseInt(prompt("Do you want to perform another transaction?\n 1.Yes \n 2. No"));
if(YES_NO === 2){
exit();
}
else{
return optionMenu();
}
}
function exit(){
alert("Thank you for patronising our ATM machine");
return false;
}
}atmMachine();
感谢您为我提供的一切帮助。
答案 0 :(得分：-1)
我不喜欢阅读您的代码-代码非常混乱而且杂乱无章。因此，我为您重新编写了整个程序：
var username,
correct_pass = (/^[0-9]{4}$/),
passTry = 3,
currentBalance = 35000;
// Input a username
function atmMachineUsername() {
username = prompt("Enter your name");
if (username !== "" && username !== null) {
atmMachinePassword();
} else {
atmMachineUsername();
}
}
// Input a valid password
function atmMachinePassword() {
var pswEntry = parseInt(prompt("Dear " + username + ", enter your 4 digit PIN"));
checkPassword(pswEntry);
}
// Verify Password meets requirements
function checkPassword(userInput) {
if (correct_pass.test(userInput)){
selectAccountType();
} else {
while (!(correct_pass.test(userInput))) {
if (passTry === 1) {
alert("Incorrect PIN.");
alert("Maximum tries exceeded! Your account has been locked. Contact your bank for support.");
exit();
break;
} else {
passTry -= 1;
alert("Incorrect PIN. Please try again.");
alert("You have " + passTry + " chance/s to try");
atmMachinePassword();
}
}
}
}
// Select Which account type to use
function selectAccountType() {
var accountType = parseInt(prompt("Which type of account do you have? \n 1. Savings \n 2. Current \n 3. Credit"));
if (accountType !== "" && accountType !== null && !isNaN(accountType)) {
selectFunction();
} else {
alert("Please make a valid selection");
selectAccountType();
}
}
// Select what the user wishes to do
function selectFunction() {
var atmFunctions = parseInt(prompt("Hello " + username + ", what can we do for you today? \n 1. Inquiry \n 2. Withdrawal \n 3. Deposit \n 4. Exit"));
if (atmFunctions !== "" && atmFunctions !== null && !isNaN(atmFunctions)) {
switch (atmFunctions) {
case 1:
inquiry();
break;
case 2:
withdrawal();
break;
case 3:
deposit();
break;
case 4:
exit();
break;
default:
alert("Please make a valid selection");
selectFunction();
}
} else {
alert("Please make a valid selection");
selectFunction();
}
}
// Inquiry
function inquiry() {
alert("Your current balance is $" + currentBalance);
toContinue();
}
// Deposit
function deposit() {
var depositAmount = parseInt(prompt("How much do you want to deposit?"));
if (depositAmount !== "" && depositAmount !== null && !isNaN(depositAmount)) {
currentBalance += depositAmount;
alert("You have successfully deposited $" + depositAmount + "\n" + "You now have $" + currentBalance);
toContinue();
} else {
alert("Error: please enter a number!");
deposit();
}
}
// Withdrawal
function withdrawal() {
var withdrawalAmount = parseInt(prompt("How much do you want to withdraw? \n" + "The minimum amount you can withdraw is $1000"));
if (withdrawalAmount !== "" && withdrawalAmount !== null && !isNaN(withdrawalAmount)) {
if (withdrawalAmount >= 1000) {
if (withdrawalAmount <= currentBalance) {
currentBalance -= withdrawalAmount;
alert("Transaction successful!");
alert("Your remaining balance is $" + currentBalance);
toContinue();
} else {
alert("You do not have sufficient funds!");
withdrawal();
}
} else {
alert("You must withdraw at least $1000");
withdrawal();
}
} else {
alert("Error: please enter a number!");
withdrawal();
}
}
// Does the user wish to continue using the ATM
function toContinue(){
var yesOrNo = parseInt(prompt("Do you want to perform another transaction? \n 1. Yes \n 2. No"));
if (yesOrNo !== "" && yesOrNo !== null) {
if (yesOrNo === 2){
exit();
}
else {
selectAccountType();
}
} else {
alert("Please make a valid selection");
toContinue();
}
}
// Exit the ATM
function exit() {
alert("Thank you for patronising our ATM machine");
// To simulate a real ATM, get ready for next user
// atmMachineUsername();
}<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>https://stackoverflow.com/questions/51977233/atm-machine-request-with-javascript-function</title>
</head>
<body onLoad="atmMachineUsername();">
</body>
</html>
不客气。