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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40 views

Pointer handle with some runtime checking

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. ...
2
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2answers
76 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 ...
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20 views

Transposing matrices [on hold]

The idea is to use functions in order to transpose matrices. For some reason, C won't allow me to return the arrays themselves so I tried using pointers. I'm not very good with pointers, so this ...
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3answers
163 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. ...
2
votes
2answers
52 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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3answers
74 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 ...
5
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4answers
335 views

Using std::unique_ptr and std::move

I'm trying out new things (on class Inproc), specifically using std::unique_ptr and ...
-3
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2answers
82 views

Simple auto_ptr [closed]

I wrote my own simple auto_ptr class, but detected some magic. C++ Header file ...
4
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0answers
81 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 ...
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2answers
62 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
189 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
56 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? ...
0
votes
1answer
77 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
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2answers
536 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 ...
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vote
2answers
75 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
4answers
139 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, ...
4
votes
1answer
890 views

Implement a string in reverse using pointers and recursion

I'm trying to reverse a string using pointers and recursion, and I send it a char array. Is this the best way, or is there a better one? ...
3
votes
3answers
214 views

Simple shared pointer

I wrote a simple shared pointer, which I think works pretty well. I would like to see your review of it. This is the header file: ...
6
votes
2answers
216 views

Layer Stack class to practice std::shared_ptr

The following three source files is to define and test a class StackLayer. While it was written in a need for scalable layer-based architecture design, it was also ...
5
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2answers
183 views

Singleton typed memory manager

For my resources management, I wanted the objects allocated on the heap to be in a contiguous block of memory. Obviously, each data type then has to have their own chunk of memory. I could have used a ...
4
votes
1answer
116 views

Builder/named argument/fluent interface pattern with unique_ptr

I'm trying to figure out the cleanest way to implement a fluent interface with unique_ptr and other "modern" C++ language constructs. Here's my first attempt: ...
8
votes
3answers
620 views

Travelling Salesman in Qt

I am writing a recursive function based on the Travelling Salesman Problem. Is this a correct way of doing things, or am I creating memory leaks? Prerequisites are: a two dimensional matrix ...
3
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1answer
168 views

Auto-recycling C++11 polymorphic smart pointers

I've recently read an interesting blog post by Philipp Zschoche: it explains how it's possible to avoid unnecessary allocations/deallocations by keeping track of previously allocated memory in a ...
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1answer
45 views

Trimming exactly two white spaces from string at O(N) [closed]

This is the optimized code I have written for removing/trimming one white space from a given string. I'm required to remove exactly two spaces from the string at the same cost of \$O(N)\$ by ...
2
votes
2answers
110 views

Pointers for struct and `for`

I know something about pointers, but I'm trying to check my knowledge on a sample. Can somebody check if my code is good? I don't think that I should use pointers in these ...
3
votes
2answers
556 views

Binary Tree with C++11 smart pointers

I'm trying to replace the use of raw pointers with smart pointers in my C++ code. The following bit is from my first attempt at a self-balancing binary tree, though there is nothing self-balancing at ...
0
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1answer
96 views

One more shared pointer

Here's a (hopefully) better shared pointer than the previous one. The improvement is that now it should also accept function and lambda objects. Should work fine with threads. ...
10
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3answers
3k views

Implementation of stack using pointers

Please review my code and let me know how I can possibly improve it. ...
4
votes
0answers
261 views

Smart pointer memory pool

I'm using a third-party library which utilizes boost::shared_ptr for memory management. The problem is that I need to allocate many objects and I have detected ...
6
votes
2answers
217 views

How best to keep track of an unknown number of objects?

I have a manager class that will manage an unknown number of objects. I'm currently storing the objects in a NSMutableArray object, and when I need to find one, I ...
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2answers
555 views

Proposed solution to dangling pointers: a non-owning smart pointer

The lifetimes of various objects referring to each other are sometimes only known at runtime. For example, in a side scrolling shooter game, a HomingMissile ...
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votes
1answer
104 views

Creating a list using a struct in C

I just got into structs and I decided to create a list using them: ...
6
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4answers
209 views

Pass pointer data across multiple functions

I would like review on the following dynamic memory allocation process and suggestions on whether there are any memory leaks. Following code is not real code in use, but I'm trying to understand ...
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1answer
56 views

getword that properly handles undersores, string constants, comments, or preprocessor control lines

Our version of getword does not properly handle underscores, string constants, comments, or preprocessor control lines. Write a better version. This is the exercise 6-1 and can be foud on K&R ...
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2answers
440 views

C struct or pointer to struct?

I am currently using this code (and more) to deal with 2D matrices. I am not very proficient in C, so I am not quite sure, if this is a good way of doing it. I've seen other people in similar ...
10
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1answer
129 views

Pascal Triangle program in C

I've created a program to calculate Pascal's triangle: ...
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2answers
154 views

Smart pointer implementation

I've decided to implement a simple smart pointer: ...
10
votes
3answers
854 views

Tail implementation in C

Write the program tail, which prints the last n lines of its input. By default, n is 10, ...
6
votes
2answers
268 views

Linked list implementation in C

I'm learning C for mainly for fun and to get a better understanding of how things work under the hood (most of my experience lies with high-level languages). I've been following quite a few books and ...
2
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1answer
120 views

Bidirectional map based on memory manipulation

This is a bidirectional map implementation that stores the values as pairs on the heap, and uses pointer arithmetic for efficient lookup. codepad link, may be easier to read ...
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1answer
86 views

Writting day_of_month and month_day with pointers instead of array indexing

Rewrite the routines day_of_year and month_day with pointers instead of indexing. The exercise is quite simple, this is the ...
4
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2answers
117 views

Optimising LinkedList class - Part 2

This is part 2. My problems are with too any pointers and with long body code in the following functions: ...
4
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2answers
157 views

Optimising a LinkedList data structure - Part 1

I have implemented a linked list. I feel I overdid it with pointers, used old standards and C++11, and I ended with too many lines of code. I will make my quotations into two parts: one for the ...
7
votes
1answer
66 views

Storing lines in an array

Rewrite readlines to store lines in an array supplied by main, rather than calling alloc() to maintain storage. How much ...
3
votes
1answer
88 views

C dynamic array and pointers

I've written an implementation of a dynamic array in C, but I'm not sure if my implementation is correct... This is what I'm worried about: if I add an element, will it remain in the collection? This ...
2
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1answer
118 views

Pointer version of itoa

Rewrite appropiate programs from earlier chapters and exercises with pointers instead of array indexing. Good posibilities include getline(Chapter 1 and 4), ...
10
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2answers
224 views

strend, function that checks the occurence of a pattern at the end of a string

Write a function strend(s, t) which returns 1 if the string t occurs at the end of ...
10
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4answers
2k views

Pointer version of strcat

Write a pointer version of the function strcat that we showed in Chapter 2: strcat(s, t) copies the string t to the end of ...
5
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1answer
65 views

Shorten a sorting function

I have this function: ...