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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Reading from a file line by line without losing previously read lines [closed]
I'm trying this piece of code. I expected that w will hold the first line of the file and l will hold the second, yet the output shows that both display the 2nd line. Is there something I'm missing on ...
-3
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2answers
63 views
Array to function to int arithmetic
I want to get the value of an integer from within a struct pointer. Simply: int cool = *(*(&(coolPtr->map)) + x); can this be simplified? The rest of the ...
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2answers
64 views
C++ Winsock HTTP Request Library
I'm trying to write a HTTP Request library for practice with Sockets and C++ in general. I created a seperate function to setup the struct needed to Connect() however it is now breaking and I cant ...
2
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3answers
85 views
DeepPtr: a deep-copying unique_ptr wrapper in C++
When using the pimple idiom it is necessary to represent your "impl" as a forward declared pointer in the header file. This necessitates a lot of boilerplate code to implement the rule of five.
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6
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1answer
104 views
Random String Generation - Base36 and optimization
This is some fairly heavily optimized C#. Aside from reading like C++ code due to all of the pointers, does this pass sanity checks, and is there any way to improve it, while keeping its speed (or ...
5
votes
1answer
68 views
Cancellable futures, interaction with throwing destructors
I'm reinventing std::future from scratch (for an upcoming talk). I'd like to incorporate as many of the latest and most likely-to-succeed proposals as possible, and ...
4
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1answer
53 views
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1answer
98 views
Refactor C# unsafe method [closed]
I have the following two unsafe methods that I would like to refactor:
...
4
votes
1answer
59 views
Passing variable pointer as string to another function
With Delphi 7 I need to create a TStream variable and use/free it in another part of the code. Unfortunately it cannot be passed as "normal" parameter.
I created a ...
8
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3answers
259 views
Generic stack in C
I tried to implement a generic stack in C using void pointers and tried to keep it as simple as possible by delegating all responsibility to the caller of the ...
5
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2answers
91 views
18
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5answers
1k views
Inventorizing the universe
I recently started re-factoring a project I hadn't touched in many months.
The original purpose was to be an inventory management system for a game I played, Ogame. In this game you play inside a ...
3
votes
2answers
57 views
Linked list insertion
I have written the code below for inserting an element at the position specified by the user.
I have seen the code in multiple books, and they have always used two pointers in the function that ...
8
votes
2answers
112 views
Smart pointer or how not to leak a pointer
Wrote a couple of blog articles about smart pointers.
Unique Pointer
Shared Pointer
Constructors for Smart Pointers
So I suppose it time to get the result reviewed.
This is not supposed to be a ...
3
votes
2answers
147 views
Finding the min and max of an array, using a pointer
Modify the maxmin.c program so that the max min function uses a
pointer instead of an integer to keep track of the current position in
the array.
maxmin.c
...
4
votes
2answers
71 views
A clone_ptr<T> that does not require T to have a clone method
Here is my clone pointer template:
...
2
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2answers
105 views
Build a time struct for current time in UTC
I'm learning about time structs. Without assigning either in code or input routines I want the current time. Please help me refactor this, if it should be.
This code just tries to make a time struct ...
4
votes
2answers
62 views
Merge Sort in Perl
I'm new to Perl and have successfully written a merge sort program. I'll paste the entire program below, but would like mostly a review of the subroutines ...
15
votes
2answers
1k views
Can I buff up your file?
Here I have a method for reading the contents of a file into a buffer and returning whether or not it is successful.
Here is what I would like reviewed:
Speed: Am I reading in the file as fast as ...
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2answers
99 views
1
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2answers
338 views
Implementation of unique_ptr and make_unique for aligned memory
I am working on a version of std::unique_ptr and std::make_unique for aligned memory. The purpose of this is vectorization, ...
1
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1answer
110 views
Casting between types for shared_ptr
I'm implementing an Entity-Component-System. Basically, an entity is a wrapper around an ID, a component is just a POD struct, and a System is a class that does work on components corresponding to the ...
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2answers
68 views
5
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1answer
95 views
Single LinkedList using smart pointers
In order to learn C++11, I propose to myself implement a simple single linked list using smart pointers. The idea was to cover the basic operations without leave any memory leak.
I came up with a ...
8
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1answer
146 views
Implementation of a new kind of smart pointer in C++
I'm tempted to write a new kind of smart pointer which, I believe, is less intrusive than boost::intrusive_ptr and has the same memory footprint.
The code for the ...
1
vote
3answers
149 views
Writing the function strend()
Due to being unable to ask a C programming language expert or advanced user in person, I'm posting this simple question about my C code. Today I was refreshing my C with exercise 5.4 of the C ...
3
votes
1answer
239 views
Remove odd valued nodes from linked list
The function remove_odd is to remove odd valued nodes (surprise!!) from the linked list head. The code is very long and cryptic but it seems to work.
Please help ...
4
votes
1answer
89 views
Smart pointer mark II - my answer to C++ 11 shared_ptr
I am writing this smart pointer as a learning exercise. Any feedback would be most appreciated.
Any flaws? Have I missed any test cases?
smart_pointer.hpp:
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6
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3answers
243 views
Reading, echoing, and returning integers in an array
I was wanting some clarification on my code, as I am new to pointers in C. I am trying to return an array from a simple function just so I can understand exactly what it is that I'm doing.
Here is ...
4
votes
1answer
117 views
Truncate 160-bit output from SHA-1 to 64-bit uint64_t
I'd like to truncate 160-bit output from SHA-1 to receive a (weaker) 64-bit digest.
It has been a while since I did the type of low-level C pointer arithmetic in the but-last line. Could you please ...
10
votes
3answers
1k views
Initializing and printing an array using pointers and dynamic allocation in C
I have written a code for basic array creation and printing it's values in C. I would appreciate comments on how it can be improved, and the industry standards.
One issue I'm encountering is having ...
4
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2answers
315 views
C++ smart pointers and classes
I've started learning C++ recently and want from what I've gathered smart pointers are the way to go when storing stuff on the free store. I want to make sure I've got the basic hang of C++(11) ...
3
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1answer
41 views
Returning the next node
What is considered to be a good programming practice for returning value from the function? For example, if we have a function in C named ...
2
votes
1answer
87 views
Pointer handle - absolute follow-up
This is a follow-up to:
Pointer handle - follow-up
Pointer class/handle
Please review my pointer class.
...
4
votes
2answers
84 views
Pointer handle - follow-up
This is a followup to:
Pointer class/handle
Please review this pointer class.
...
2
votes
1answer
76 views
6
votes
1answer
66 views
Pointer handle - only allocates in stack
This is a pointer class of mine that I would like to have reviewed. Right now it only allocates in the stack and has no copy or move operations.
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2
votes
2answers
167 views
Yet another smart pointer implementation for learning
I based this implementation on CountedPtr in The C++ Standard Library book by Nicolai Josuttis (page 222) and also available online here.
I know that I can use the C++11 smart pointers but this is a ...
6
votes
3answers
7k views
Printing the contents of a string array using pointers
I'm currently studying C and I'm trying to just print the contents of a string array. I'm using pNames to point to the first char pointer and iterating from there.
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2
votes
2answers
176 views
Basic myVector class raw vs smart pointer
I'm writing a myVector class for a class I'm taking. I don't believe I'm "strong" with smart pointers right now, so that's my question. This is just an excerpt ...
4
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4answers
285 views
Printing out all possible combination of printable ASCII 7-bit characters to stdout
This takes over 60 minutes to execute. The program is small in size, about 16kb. I am thinking that the repeated calls to printf slows it down significantly, rather ...
6
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4answers
5k views
Using std::unique_ptr and std::move
I'm trying out new things (on class Inproc), specifically using std::unique_ptr and ...
4
votes
0answers
157 views
Wrap function pointers in template classes
I'm working on a C++ library for Arduino and other embedded systems.
I'm currently working on wrapping up function pointers and member-function pointers into two C++ template classes (function and ...
1
vote
2answers
542 views
Binary search tree with templates
I am currently attempting to become proficient in C++ and started by implementing a basic binary search tree. Most of the programming I have done is in Ada, Python and C.
I would like to be able to ...
5
votes
2answers
315 views
Constructing a graph and performing a depth-first traversal
Please review the use of pointers and design in graph construction code and its depth first traversal. I haven't used smart pointers as I want to understand any issues in following implementation with ...
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2answers
88 views
Deleting values from std::vector of different types
I need to make a vector of different types and be able to delete the values (please ignore anything else but deleting the values for now). Is the next code safe to delete the values?
...
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1answer
422 views
Polymorphic template cloning class
I have a requirement of a templated clone() method which Base classes can implement through an ICloneable interface and all the ...
10
votes
2answers
570 views
Smart but simple pointers
For practice, I've implemented my own smart pointer class. It's a 'unique pointer', meaning it doesn't allow copies of itself (when copying from a into ...
2
votes
2answers
161 views
Speeding up and shortening a loop [closed]
I'm still relatively new to C++ and I've written a program that could do with being a bit shorter and faster.
I use this same set of for loops many times to cycle through the whole tree of values. ...
6
votes
5answers
464 views
Custom class for a borrowed unique_ptr<T>?
In C++11, I tend to have master objects that maintain sole ownership of a collection of some children objects. Let's assume these children objects are non-copyable (for instance, ...
