C++ :: Obtaining Pointers To Represent Each Branch In Hierarchy?
Aug 24, 2014
My program has a large version of this, where every leaf class is singleton, and pointers of the base class to represent each possible path are stored in a map during compile time. I have it working as follows:
But System::initializePrototypes() is constructing the map manually, and I want to use recursion somehow, because my hierarchy is much bigger than this. It's also easy to miss a path doing it the above way, and when new classes are added to the hierarchy, it will be a nightmare to update the map. So the ideal solution is recursion constructing the map perfectly--and when new classes are introduced, nothing needs to be added to System::initializePrototypes().
I'm writing a program where a user keeps entering numbers until "0" is entered.Once "0" is entered the loop ends and It displays the mean. Problem is it counts the "0" in the average.
e,g:
Enter number 1: 5 Enter number 2: 2 Enter number 3: 3 Enter number 4: 0
The mean is 2.5. But I want it to only count everything before the "0". (5 + 2 + 3) / 3 = 3.333333
I want to generalize my productFunction below to a template family of functions where the template merely changes the * to + or whatever else operator I wish to use.
How can I turn a template parameter into various operators? (apart from using switch statements that will reduce the performance and make the code really ugly) What kind of metatemplating method converts a compile-time constant to an operator?
I am trying to obtain the values of cookies from a particular website. The problem is, when I run the following code, it only loops through 4 of 10 cookie values present.
Furthermore, the values are turning up as deleted: Reference
The problem with the above, I can't seem to find a reference to "Request". I am using the libraries "using System.Net and using System.Web", so I am unsure why Request is not being recognized.
My goal is to retrieve one cookie value so that when a user from my website logs in, my C# application will recognize that user.
How do we design a container of objects all of which belong to some subclass which directly/indirectly inherits from a given parent class? Moreover, I would like to have functions that enable me to pick only objects of a certain class type from the container.
For example if the parent class is A and I have a hierarchy of classes that derive from it, we must have a container that can contain any class that exists in this hierarchy. Also, get_B() must be able to let me examine only those objects in this container that inherit (directly/indirectly) from class B (class B exists in the hierarchy rooted at A).
Preferably, we would like to avoid downcasting. Or even explicit typechecking of any sort.
I have been given a HW to write code for a payroll system. The base class would be Employee. There are four types of employees.
1 - Salaried (fixed salary, no matter the hours) 2 - Hourly (overtime [>40 hours] pays time and half) 3 - Commissioned (paid percentage of sales) 4 - Base-plus-commissioned (base salary + percentage of sales)
Also add a private data member birthDate (a Date object) and departmentCode, an int to class Employee.
1 - Is the following hierarchy that I'm visualizing right? Or is a change needed?
Here is the link: [URL] ....
2 - In hourly, what does in round brackets mean? What is meant by "pays time and half"?
3 - In base-plus-commissioned, is it required to take "base salary" from user or I just get salary from the salaried employee?
I got a mesh which has an edge with a specific transformation (translation + orientation). When this configuration / transformation is changed, its neighbours are to be updated. This structure is kept inside a tree so that when a root "frame" is passed to a method like UpdateHierachy, the mesh will recursively update itself.
If, I don't pass this method the root element, which is in my case, how do I change the rest of the structure? The reason to do this is because I want to say move the door, the windows and furniture will move along with it.
im working on Book Ordering system and i having trouble how to make the system recognize different price values when i add different books into it, also how to make the system to be able to add/remove cart?
I will make a program to read the image in C++. And later, the image will represent by array 3D, which (x,y) represent the spatial coordinate of (height*weight) image (pixel) and z represent the intesity of those image (0-255).
In matlab, the code for do that is --> imread('image.jpg')
Here is the code I have written so far. My problem is that when the second user enters its position the last user's position is wiped of the board. I want to know how I can hold that position and keep doing so until the game is finished. I thought that calling the previous function would do that (and you can see where I have put that into a comment) but it doesn't.
Code: #include <iostream> //includes header file using namespace std; //function prototypes void printLeftUpper(int i, int j); void printMiddleUpper(int i, int j);
I've attached an image that shows a basic table with dynamic content in the header.
Initially, I thought about using a datagrid. However, I can't use a datagrid because of the format of my data visually. The DataGrid would not allow me to have static and dynamic data inside my column headers.
You see anything I am displaying in brackets, {}, are being updated with results after I process some data in the backend. After the data analysis is done, the results are displayed based on an algorithm.
So, let's say for control1, for each family, it would indicate whether the data passed or failed. Then, in the rows themselves, it would update with choice 1 or choice 2 depending on the data generated.
So, the data that is in brackets shows properties being updated. I'm not sure what UserControl I can use to accommodate this kind of display.
The following code is an example of how task are created with micro cos III in c. I am trying to figure how to create similliar code in C++. My problem is how do I instantiate objects and how to use member functions to represent task. Within the create task routine the address of function is passed as argument. How do I do this in C++? Will I need more than one class? New to embedded C++.
I am trying to make an interpreter. This stack function is supposed to represent the scope of the program, meaning scope of the variables. The START represents a new scope, and FINISH represents the current scope closing. I am trying to do a recursive function in which the stack is updated with each recursive call, which represent a new scope for each call.After i enter a new scope and the scope ends, my program prematurely terminates.
void stack(ifstream& file,Hash& Table) { string line; getline(file,line); int i=0;
Given a product category and subcategory representation:
a. Come up with a tree data structure to minimally (in terms of storage) represent this b. Write a program to convert the given representation (shown in example below) to this c. Write a function to output the tree structure in a nice human readable format
Note: a. There can be any number of levels of depth b. Rows may be repeated in input, but need to feature only once in the final tree.
Example category list (read this input from a file):
I am having trouble of exactly how "class" works. I dont know what the difference between set and get is. I have this code:
#include <iostream> #include <cmath> using namespace std; class Point { private: double px; double py;
[Code] .....
How to get void Triangle::setBottomLeftX(const double x) to work.
Implement the get and set member functions for the class Triangle. Use the appropriate class attributes of the class Triangle.
a. The location of the bottom left vertex is stored in the member attribute blPoint. b. The top left vertex can be computed from blPoint and the height. c. The bottom right vertex can be computed from blPoint and the length.
I am a little confused while comparing char pointers to integer pointers. Here is the problem:
Consider the following statement; char *ptr = "Hello"; char cArr[] = "Hello";
When I do cout << ptr; it prints Hello, same is the case with the statement cout << cArr;
As ptr and cArr are pointers, they should print addresses rather than contents, but if I have an interger array i.e. int iArr[] = {1, 2, 3};
If I cout << iArr; it displays the expected result(i.e. prints address) but pointers to character array while outputting doesn't show the address but shows the contents, Why??
I'm trying to write a function that takes a 32bit address and a data to store at this address.
I'm wanting to take the 32 bit memory address eg 0x12345678 and split it into 4 x 2 bytes 12, 34, 56, 78
then each of the 4 entries is at most a 256 entry array.eg FF, FF, FF, FF
So in this example, 0x12 points to 0x34 in the second array, which points to 0x56 in the third array, which finally points to 0x78 in the last array. This last array holds the actual data.
After successfully doing 0x12345678, say I might get a read for 0x1234AABB. So, the first and second pointers already exist, but I then have to create and write to dynamically created arrays.
The arrays need to have all entries set to NULL so that i know whether to follow the pointers to overwrite a previously entered value or create new arrays and pointers.
It all looks good and simple in the pseudo code I've written up but I'm having trouble coding it. I'm currently trying to deal with the first entry case, ie all array elements are NULL, but I'm getting confused with the pointers and creation of new arrays.
void cpu::store(unsigned int mem_add,unsigned int mem_val) { int first = (mem_address&4278190080)>>24; int second = (mem_address&16711680)>>16; int third = (mem_address&65280)>>8; int fourth= (mem_address&255);
