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  • invalid input by the user

    - by TJL
    hey guys so this is my program, I need to notify the user that if hhe/she enters a letter other than w d b or w that is an invalid request. what ive done so far does this, but when i input a number to the dollars_withdraw or dollars_deposit or account_balance the program will do the transaction but also add the "invalid request" before going back to main loop. how do i change it so the program wont do that for numerical inputs for the withdraw deposit and balance?: // Atm machine.cpp : Defines the entry point for the console application. #include <iostream> #include <string> using namespace std; int main () { char user_request; string user_string; double account_balance, dollars_withdraw, dollars_deposit; account_balance = 5000; while(account_balance >0) { cout << "Would you like to [W]ithdraw, [D]eposit, Check your [b]alance or [Q]uit?" << endl; cin >> user_string; user_request= user_string[0]; if(user_request == 'w' || user_request== 'W') { cout << "How much would you like to withdraw?" << endl; cin >> dollars_withdraw; if (dollars_withdraw > account_balance || dollars_withdraw <0) cout << "Invalid transaction" << endl; else account_balance = account_balance - dollars_withdraw; cout << "Your new balance is $" << account_balance << endl; } if (user_request == 'd' || user_request== 'D') { cout << "How much would you like to deposit?" << endl; cin >> dollars_deposit; if (dollars_deposit <0) cout << "Invalid transaction" << endl; else account_balance= account_balance + dollars_deposit; cout << "Your new balance is $" << account_balance << endl; } if(user_request == 'b' || user_request == 'B') { account_balance= account_balance; cout << "Your available balance is $" << account_balance << endl; } if(user_request == 'q' || user_request == 'Q') break; else cout << "Invalid request " << endl; } cout << "Goodbye" << endl; return 0; }

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  • String.split() method bug in GWT 2.0.3

    - by Domchi
    I'm upgrading a GWT project from GWT 1.7.1 to currently newest version 2.0.3. It seems that new GWT broke String.split(String regex) method - I get the following error on the Javascript side: this$static is undefined This happens in this line of my .nocache.js file: if (maxMatch == 0 && this$static.length > 0) { ...which happens to be a part of String split method equivalent in Javascript. Is there a cure for this, apart from doing string splitting myself?

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  • NSThread with class method?

    - by Jeroen Sterckx
    Is it possible to run a class method (starting with a '+') in a separate thread? Normally I call the method like [myClass myController]; I tried [NSThread detachNewThreadSelector:myController toTarget:myClass withObject:nil]; without success.

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  • Why use Monte-Carlo method?

    - by Gili
    When should the Monte-Carlo method be used? For example, why did Joel decide to use the Monte-Carlo method for Evidence Based Scheduling instead of methodically processing all user data for the past year?

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  • How to use the callback method with a c++ directshow sample grabber

    - by Mr Bell
    I have a sample grabber hooked into my directshow graph, based on this example http://msdn.microsoft.com/en-us/library/dd407288(VS.85).aspx the problem is that it uses one shot and buffers. I want to continuously grab samples, and i'd rather have a callback than i guess polling for the samples. How do use the SetCallback method? SetCallback(ISampleGrabberCB *pCallback, long WhichMethodToCallback) how do I point pCallback to my own method?

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  • Trying to change variables in a singleton using a method

    - by Johnny Cox
    I am trying to use a singleton to store variables that will be used across multiple view controllers. I need to be able to get the variables and also set them. How do I call a method in a singleton to change the variables stored in the singleton. total+=1079; [var setTotal:total]; where var is a static Singleton *var = nil; I need to update the total and send to the setTotal method inside the singleton. But when I do this the setTotal method never gets accessed. The get methods work but the setTotal method does not. Please let me know what should. Below is some of my source code // // Singleton.m // Rolo // // Created by on 6/28/12. // Copyright (c) 2012 Johnny Cox. All rights reserved. // #import "Singleton.h" @implementation Singleton @synthesize total,tax,final; #pragma mark Singleton Methods + (Singleton *)sharedManager { static Singleton *sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[Singleton alloc] init]; // Do any other initialisation stuff here }); return sharedInstance; } +(void) setTotal:(double) tot { Singleton *shared = [Singleton sharedManager]; shared.total = tot; NSLog(@"hello"); } +(double) getTotal { Singleton *shared = [Singleton sharedManager]; NSLog(@"%f",shared.total); return shared.total; } +(double) getTax { Singleton *shared = [Singleton sharedManager]; NSLog(@"%f",shared.tax); return shared.tax; } @end // // Singleton.h // Rolo // // Created by on 6/28/12. // Copyright (c) 2012 Johnny Cox. All rights reserved. // #import <Foundation/Foundation.h> @interface Singleton : NSObject @property (nonatomic, assign) double total; @property (nonatomic, assign) double tax; @property (nonatomic, assign) double final; + (id)sharedManager; +(double) getTotal; +(void) setTotal; +(double) getTax; @end

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  • XAML ComboBox Bind to Method

    - by griegs
    If I have a method in my C#; public CollectionView Months { get { CollectionView retList = new Enumerations.Months().ToCollectionView<Enumerations.Months>(); return retList; } } And I have a ComboBox; <ComboBox x:Name="ddlMonth" Grid.Row="3" Grid.Column="1" ItemsSource="{Binding Source={StaticResource Months}}"/> How can I bind my ComboBox to my method? I should add I'm a complete xaml newbie.

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  • read user Input of custom dialogs

    - by urobo
    I built a custom dialog starting from an AlertDialog to obtain login information from a user. So the dialog contains two EditText fields, using the layoutinflater service I obtain the layout and I'm saving a reference to the fields. LayoutInflater inflater = (LayoutInflater) Home.this.getSystemService(LAYOUT_INFLATER_SERVICE); layoutLogin = inflater.inflate(R.layout.login,(ViewGroup) findViewById(R.id.rl)); usernameInput =((EditText)findViewById(R.id.getNewUsername)); passwordInput = ((EditText)findViewById(R.id.getNewPassword)); Then I have my overridden onCreateDialog(...) : { AlertDialog d = null; AlertDialog.Builder builder = new AlertDialog.Builder(this); switch(id){ ... case Home.DIALOG_LOGIN: builder.setView(layoutLogin); builder.setMessage("Sign in to your DyCaPo Account").setCancelable(false); d=builder.create(); d.setTitle("Login"); Message msg = new Message(); msg.setTarget(Home.this.handleLogin); Bundle data = new Bundle(); data.putString("username", usernameInput.getText().toString());// <---null pointer Exception data.putString("password", passwordInput.getText().toString()); msg.setData(data); d.setButton(Dialog.BUTTON_NEUTRAL,"Sign in",msg); break; ... return d; } and the handler set in the Message: private Handler handleLogin= new Handler(){ /* (non-Javadoc) * @see android.os.Handler#handleMessage(android.os.Message) */ @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub Log.d("Message Received", msg.getData().getString("username")+ msg.getData().getString("password")); } }; which for now works as a debugging tool. That's all. The Question is: what am I doing wrong? Because when I reach the line highlighted in the code ( the line in which I read the fields in the dialog ) I always get a null pointer exception. Could somebody please tell me the reason why it is so? And give some guidelines to work with dialogs. Thanks in advance!

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  • Static property references non-static method

    - by rhj4
    How can a static property reference a nonstatic method? Example: public static int UserID { get { return GetUserID(); } } private int GetUserID() { return 1; } When I try to compile this, I get the error: "An object reference is required for he non-static field, method or property "GetUserID()"

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  • Upper extension method in linq to NHibernate

    - by Daniel
    I would like to use the Upper extension method which is declared on the IDbMethods interface against Sql Server 2008. I understand that this will translate to UPPER() on sql server. However I can not figure out how to get an implementation of IDbMethods so that I can use the extension method.

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  • Calling a static method on a generic type parameter

    - by Remi Despres-Smyth
    I was hoping to do something like this, but it appears to be illegal in C#: public Collection MethodThatFetchesSomething<T>() where T : SomeBaseClass { return T.StaticMethodOnSomeBaseClassThatReturnsCollection(); } I get a compile-time error: "'T' is a 'type parameter', which is not valid in the given context." Given a generic type parameter, how can I call a static method on the generic class? The static method has to be available, given the constraint.

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  • Mock static method Activator.CreateInstance to return a mock of another class

    - by Jeep87c
    I have this factory class and I want to test it correctly. Let's say I have an abstract class which have many child (inheritance). As you can see in my Factory class the method BuildChild, I want to be able to create an instance of a child class at Runtime. I must be able to create this instance during Runtime because the type won't be know before runtime. And, I can NOT use Unity for this project (if so, I would not ask how to achieve this). Here's my Factory class that I want to test: public class Factory { public AnAbstractClass BuildChild(Type childType, object parameter) { AnAbstractClass child = (AnAbstractClass) Activator.CreateInstance(childType); child.Initialize(parameter); return child; } } To test this, I want to find a way to Mock Activator.CreateInstance to return my own mocked object of a child class. How can I achieve this? Or maybe if you have a better way to do this without using Activator.CreateInstance (and Unity), I'm opened to it if it's easier to test and mock! I'm currently using Moq to create my mocks but since Activator.CreateInstance is a static method from a static class, I can't figure out how to do this (I already know that Moq can only create mock instances of objects). I took a look at Fakes from Microsoft but without success (I had some difficulties to understand how it works and to find some well explained examples). Please help me! EDIT: I need to mock Activator.CreateInstance because I want to force this method to return another mocked object. The correct thing I want is only to stub this method (not to mock it). So when I test BuildChild like this: [TestMethod] public void TestBuildChild() { var mockChildClass = new Mock(AChildClass); // TODO: Stub/Mock Activator.CreateInstance to return mockChildClass when called with "type" and "parameter" as follow. var type = typeof(AChildClass); var parameter = "A parameter"; var child = this._factory.BuildChild(type, parameters); } Activator.CreateInstance called with type and parameter will return my mocked object instead of creating a new instance of the real child class (not yet implemented).

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  • Method overriding

    - by Gandalf StormCrow
    Can you override method in java without using annotations? Because eclipse doesn't support it if you use JRE6, you need to switch back to 5 to use @Override annotation. Will this method be overriden if I remove the annotation? @Override public String toString() { return name + " [" + genre + "]"; }

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  • Use Windbg find argumet passed to a COM+ method

    - by G33kKahuna
    Generated a debug diagnostic dump file for a COM+ application. Upon analysis look like threads deadlocks at line OLE32!SwitchSTA. My symbol path is pointing to msdl.microsoft.com/download/symbols. Is there way to know what arguments were passed to this method? In general, how does one use Windbg to find the input argument value to the method call? thanks in advance

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  • How can I find the method that called the current method?

    - by flipdoubt
    When logging in C#, how can I learn the name of the method that called the current method? I know all about System.Reflection.MethodBase.GetCurrentMethod(), but I want to go one step beneath this in the stack trace. I've considered parsing the stack trace, but I am hoping to find a cleaner more explicit way, something like Assembly.GetCallingAssembly() but for methods.

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