In computer science, a pointer is a programming language data type whose value refers directly to (or "points to") another value stored elsewhere in the computer memory using its address.
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33 views
string-length, structs, pointers in c
So since I'm just new with learning C (this is the second day now), I'd be very happy if someone could review my code:
what I tried to do is:
create a structure containing a string- and a length-...
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0answers
11 views
Linked List, return pointer function is magically changing my code [on hold]
this LinkedList class has me running up a wall this is my main method
...
7
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3answers
1k views
String comparison using pointers
This piece of code works fine. But I'm wondering if it can be done in a more efficient way. More specifically, this part (*(s1 + i)) if it possible to force it to ...
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2answers
99 views
Custom STL Vector in C++
This is my first time I tried to implement a custom STL vector with iterator. I have some questions:
What are better ways to write an iterator?
I know that there is a ...
3
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1answer
101 views
Linked List: Smart Pointer Implementation
Linked list using smart pointers, iterative implementation. It amazes me how a std::forward_list does not allow the list to be walked until the last pointer is <...
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1answer
67 views
Implementing a single linked list using smart pointers (replace std::shared_ptr with std::unique_ptr)
As an example code I've given here, I have the feeling the use of std::shared_ptr is wrong and should be replaced using a ...
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1answer
91 views
Smart Pointers Queue Implementation
To practice around with C++11 smart pointers I was trying to implement a simple Queue to go beyond a simple Linked List. The fact that the _first and ...
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0answers
18 views
Why am I getting garbage characters in my output for Test 1 and Test3 occasionally? [migrated]
I am having problems with my Test cases writing garbage to my result variable, and I am pretty new to C, so I am having trouble determining what is causing it. Thanks
...
3
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1answer
60 views
Smart Pointers with Reference Counting - C++
I am trying to improve my general skills in C++ so I plan to write versions of shared_ptr and unique_ptr from scratch. I wrote a version of shared_ptr with reference counting and I was wondering for ...
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1answer
84 views
Converting Integer to dynamically allocated Char array, digit by digit using pointers
Problem: Write a function to convert Integer to String, using only
pointers, without array indexes, string must be dynamically
allocated.
...
3
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1answer
61 views
Book record system
I'm still new to programming. I have made a book record system and I just wanted some coding review if there is any mistakes I should fix or any improvements that are needed.
Here is the code I made
<...
11
votes
2answers
530 views
Learning pointers by implementing a basic linked list with tests
I wanted to learn about pointers and someone suggested that I give C a try, so I went through Linked List Basics from Stanford CS library, implemented some of the code (and tried to improve the code a ...
7
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3answers
203 views
Multiplayer GameObject design
I created a really basic game class. A game has GameObject instances, which currently have a position only.
This code is running on the client, and in each loop ...
3
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1answer
27 views
2D matrix - splitting the matrix in two parts with equal number of elements
The elements in the matrix are either 'M', 'G', 'P' or '.' and the algorith must write out all possible ways of splitting the matrix so it has equal number of M, G and P on each side. It's a task we'...
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1answer
44 views
Using shared_ptr as class member [closed]
I have already got the answer for my previous question, and I decided to use std::vector<int> instead of int *. I have ...
4
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3answers
95 views
Simple wrapper for member function pointers with known signature
I always wanted to know how to pass member functions as arguments, and then I stumbled across templates that could automatically deduce types, and so I rejoiced! This is used in a Publisher-Subscriber ...
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3answers
51 views
Implementing my own shared-ownership double-indirecting smart-pointer
I am implementing my own double-indirecting shared-ownership smart-pointer because I needed a way to replace the managed object a group of smart-pointers is pointing to with a new object (it's the ...
4
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1answer
95 views
Template double ended queue (deque) implementation using dynamic allocation C++
I have written my own deque class to get a better grasp of C++ pointers and memory management. The following code is part of a larger 2D isometric game I am developing. It compiles and runs fine using ...
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2answers
51 views
Inserting into a binary search tree in C
I am in the process of refactoring this simple binary search tree code responsible for adding new values:
...
3
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2answers
87 views
Callback system for events in a window
I have written a simple window event capture wrapper that gets events that happen to the window, and can be checked anywhere in the program through a global class. I wanted to be able to create a ...
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1answer
38 views
Trying to build a bare metal stack on the stack [closed]
I'm trying to implement a stack data structure, but not on the heap but using the stack. Also not using any Node or Element struct but raw ints. Is this feasible? This is my code (with debug printfs) ...
2
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2answers
247 views
A doubly linked list implementation using C++ smart pointers
I am new to "modern" C++ and decided to learn about smart pointers by implementing a doubly linked list.
I have a few problems with this code: Should the tail pointer be a weak pointer? Should the ...
4
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1answer
60 views
Linked List simple implementation
I made a simple linked list in C with the following functionalities:
Create(creates the list); Find(searches for an element in the list); Insert(inserts a value at the beginning of the list); Destroy(...
3
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1answer
106 views
C++ lock wrapper class around pointer
I have created a class which wraps pointers and behaves like a pointer would behave, minus a few cases. It is a lock wrapper class which simply locks before usage of the pointer and unlocks once the ...
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1answer
60 views
RAII object for releasing pointer with arbitrary function
The following class is a sort of "smart pointer" that can be used for automatically releasing pointers:
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2answers
98 views
shared_ptr code implementation
I have never used std::shared_ptr before and I don't really know how this smart pointer actually works but I decided to create one to verify my knowledge. Here is my code :
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1answer
63 views
List implementation with shared_ptr using C++11
I wrote list, which I think is more elaborate than usual. I would like to ask you for some tips, criticisms, and general feedback about my code.
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1answer
162 views
Find the first occurrence of a substring in a string
This is a simple version from the function strstr. It returns the address of the first occurrence of the substring s2 in s1. I want to know possible problems in the code, and how to improve it, in ...
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1answer
34 views
Implementation of the binary search algorithm [closed]
This is my first implementation the binary search algorithm. I have tested it and so far it is okay. But I need an experienced eye to review the code and recommend best practices.
...
3
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1answer
41 views
Exercise to create an insertString function to linked-list
Working from 'Programming in C' by Kochan. I'm on an exercise in the chapter 'Pointers'.
This was the exercise:
'Write a function called insertEntry() to inset a ...
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0answers
95 views
Intrusive weak pointer
WeakPtr can point to any object provided it inherits from WeakBase. So, for example, you could use it to observe an object ...
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2answers
91 views
NamedPoint class using unique_ptr for members
After reading this old article from 2001 I have tried to implement the class from it using unique_pointer.
An author's claim is that C++ is not appropriate for ...
6
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1answer
172 views
Using pointers and type cast to break up integers into byte array
Usually I don't start using pointers for a few microseconds here and there.
But with this implementation I started getting results of factor 2.
...
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1answer
52 views
Using a map of shared_ptr instead of single pointers as class members
I'm working on a node.js bindings for libcurl. As libcurl accepts many callback functions as options (like CURLOPT_READFUNCTION for example), I had to store their respective javascript callbacks ...
11
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2answers
533 views
Beep-beep I'm a car factory
I have implemented to following generic factory in C++11 using smart pointers and I would like to get some feedback about it.
(Please note that I can't use C++14)
Due to company policies I have to ...
4
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1answer
57 views
Polymorphic pointers-to-functions whose parameters are void pointers as arguments in C
My question is about this sort of table that's simplified here. Often, I find myself putting this element, (int (*)(const void *, const void *))&strcmp for <...
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1answer
93 views
Pointer lists for a C++ garbage collector
The problem
My intention is to have a class A and class B. class B has a ...
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2answers
259 views
Doubly linked list reimplemented with smart pointers
I need some suggestions on my reimplementation of a doubly linked list with smart pointers since I'm new to smart pointers in C++.
I read some docs on smart pointers and found out there are ...
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1answer
55 views
Creating a struct
Mat told me to create a struct
create a struct for the individual commands and arguments. It should
have something like the "executable" name, number of args and arg
list. Create a few ...
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1answer
28 views
C function for copying array into matrix
I want a matrix that can grow dynamically and build up a structure in RAM as input arrives from standard input och terminal (shell). First I tried with a matrix like ...
7
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2answers
214 views
An optional<T> implementation
This is an implementation of optional<T> from C++17, it is mostly standard conforming.
I'm looking for a review on efficiency, correctness and performance.
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1answer
73 views
Shell command line program
I have refactored a for loop into a function. I'm still a beginner at using C utility functions such as strtok, ...
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1answer
92 views
Avoiding pointers in this C++ linked list
As I know it is not good idea to have so many pointers in c++ code.
But I have written this simple implementation of linked list in c++ and there are many pointers in it, how can I improve that?
Also ...
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1answer
86 views
Operator Oveloading: “+” and “==” for two classes
I have one class Number (base class) and two child class Fraction and ...
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3answers
142 views
View programming pattern in C++ without raw pointers
I'm trying to achieve, for lack of a better term, a "view" pattern in C++. It's probably most comparable to "views" in the Database world, where one can make a query, and then perhaps aggregate the ...
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1answer
55 views
&(array[index]) vs (array + index) [closed]
So I'm working with a function that returns a pointer to a list item. Right now, I'm using:
...
4
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2answers
360 views
Generate all permutations in C
I have written code for generating all the permutations in C as explained here. How can the code be optimized? Are there any memory leaks?
...
4
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1answer
377 views
(C++14) Handling state in C-style function pointer callbacks
I'm having some issues coming up with a sensible solution for using shared state in a C-style function pointer. I am using GLFW to handle my OpenGL context and have created a thin wrapper around all ...
2
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0answers
75 views
Transform and transpose byte[] of 32bit image data in 24bit array image data
I would like to know if someone can think about a better solution for doing this stuff.
I have an array of raw bitmap data in 32bit format (RGBA). I need to transform and transpose this array into a ...
2
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2answers
2k views
ShoppingCart and Item Classes
I've built a class for an e-commerce Item, and the ShoppingCart class for checkout functions.
The thing I'm most concerned ...
