It seems you want to pass a non-type template parameter, and more specifically, a pointer-to-member. For what you want, you have to user: template<ObjectType gameclass::* ptr> struct foo // … Note that will allow you to access the member of an object only if you have a pointer to that object. You can have more … Read more
If you think that you need to have a circular dependency like that, there’s almost certainly a design flaw. Please see: What is the XY problem? If you insist, though, something like this will actually work: public class A { public B SomeB { get; set; } public int SomeInt { get; set; } } … Read more
There are plenty of differences. A namespace is a grouping mechanism for names, nothing more or less. On the other hand, classes: Are types. Can be instantiated. Can be derived from. Can have public, protected, and private members. Can have virtual functions. And so on. If you find yourself wondering whether you should use a … Read more
You use post increment and decrement operator : return number++; return number–; For example here : public static int addOne(int number) { return ++number; } The value number is incremented but only as soon as the next statement. So as you return, the same value as the parameter is returned. It is the same thing … Read more
Dude. Perhaps you should consider making use of named parameters. What is the “Named Parameter Idiom” http://www.parashift.com/c++-faq/named-parameter-idiom.html Or if you use Boost, consider using the following. The Boost Parameter Library http://www.boost.org/doc/libs/1_55_0/libs/parameter/doc/html/index.html Or, if you do not like that, a single parameter that is a map of a string to a union (or any, also part … Read more
You don’t have a clear concept in object oriented programming. When you create two objects, then they are completely different from each other. They do not interact with each other until they are forced.So, myMum and myDaughter are seperate objects and they do not share the values of their variables. The last two outputs are … Read more
You’re defining the variable entry inside the body of a method, this does not make entry accessible to the global scope, this is how you should embed objects: class Page1(Page): def __init__(self, *args, **kwargs): Page.__init__(self, *args, **kwargs) self.label = tk.Label(self, text=”This is page 1″) self.label.pack(side=”top”, fill=”both”, expand=True) self.entry = tk.Entry(self) self.entry.pack() As you can see, … Read more
Interface OnSystemUiVisibilityChangeListener is nested in class View, so I believe you would have to do Class.forName(“android.view.View$OnSystemUiVisibilityChangeListener”); (note the ‘$’). References: http://developer.android.com/reference/android/view/View.html http://developer.android.com/reference/android/view/View.OnSystemUiVisibilityChangeListener.html solved android Class.forName throws exception
Your two options are 1) Make them member variables 2) Add them as arguments to the print() function, as shown below, then call print within the constructor (if that is the intention) void CPOI::print(string name, double latitude , double longitude) If you pass them to the constructor, but they are not stored in member variables, … Read more
Sure this is possible 😀 There are many ways to do so. For example you can easily do this: //Obviously pseudo Code…u need a constructor..or method Public Class A{ Scanner input = new Scanner(System.in); System.out.println(“Please input the weight:”); bagWeight=input.nextDouble(); B b = new B(); double total = b.method(1337, bagWheight); System.out.println(“The total weight is: “+total); } … Read more
private members, pointers or otherwise, are data that the object either does not want messed by anyone else with or wants to know if someone messed with them. Setter and getter methods allow access to the private member, but in a controlled manner. For example if you have a private integer that under no circumstances … Read more
1) First, don’t use naked new, and don’t use new al all if it is not necessary. Because it can lead to memory leak problems. 2) Don’t use a setter just use a constructor. 3) Use const Date & in an overloaded Date constructor 4) Initialize Date with initilizer list. Use the overloaded constructor Date … Read more
I am a little confused about class,instance and object. This is my understanding about the 3 kindly correct me if I’m wrong thank you solved I am a little confused about class,instance and object. This is my understanding about the 3 kindly correct me if I’m wrong thank you
I was right about the import.. When i was trying to do: User.UserPK userpk = new User.UserPK(); It was failing because i had an import like this one: org.company.User.UserPK; What I did to solve it it’s let the import like this: org.company.User; It allowed me to instantiate the class as an inner one. Thanks for … Read more
The first Ghost is the PacMan member blinky. About the last order: Destroying pm1 exectutes ~PacMan(){ if (inky!= NULL) delete inky; cout <<“~PacMan()” << endl; } and then blinky is deleted too. If you want the opposite order, you’ve to write it here. solved The order of destructor