Questions tagged [pointers]
A pointer is a data type whose value refers directly to (or "points to") another value stored elsewhere in the computer memory using its address.
142 questions
1
vote
1
answer
577
views
Tagged pointers vs. fat pointers
I'm writing my own dynamic programming language. So far I've been using a tagged union for all values. Since this boxes primitive types needlessly, I've begun researching tagged pointers which seem to ...
- 111
1
vote
7
answers
391
views
Is it possible to introduce Pointers to a weakly typed programming language?
Most weakly typed languages do not have a concept of a pointer. Instead, most of them use references. However, is it possible to introduce pointers to such a language.
From a naive point of view, to ...
- 121
1
vote
4
answers
749
views
Passing arrays as global variables instead of pointers in C
I'm required to write the Low-Level Requirements of a Software Component which shall perform signal processing over arrays of 200k elements of integers/floats which lives in the main memory of the ...
- 31
0
votes
1
answer
79
views
Avoiding repeating code when assigning pointer addresses based on branch
I have the following code in C that reads data off a char array and makes decisions on what variables should some pointers point to.
char preset1[20];
char preset1Name[20];
int preset1Temp;
int ...
- 161
0
votes
1
answer
111
views
Is it safe to make training data and labels as global variables in C?
I'm trying to make this function called walk in C. The idea is that the function takes as parameters a point in space (represented by an array), a function (pointer), and a step size / learning rate ...
- 447
4
votes
2
answers
2k
views
Reference variable vs Alias
When I started programming, I learned what Pointers are in C++. In Java, references are variables which hold the address of an object. So conceptually it's a pointer, without the ability to directly ...
- 237
7
votes
1
answer
201
views
What is the term used to describe the number of times a pointer can be dereferenced?
For example, which term completes the sentence "p has 5 ____" in order to describe a situation like int *****p?
- 79
0
votes
1
answer
402
views
Implement Dependency Inversion in C with UML diagram
As per Robert C. Martin in Clean Architecture, he gives a simple UML diagram to illustrate Dependency Inversion.
To put it simply, HL1 initially referred to ML1 without interface to invoke F() ...
- 185
-1
votes
5
answers
2k
views
In C++, does dereferencing a nullptr itself cause undefined behaviour, or is it the acting upon the dereferenced pointer which is undefined?
I happen to have a reason why I might want to dereference a nullptr.
Of course when I do, my program crashes, and from what I gather, this is due to the compiler playing it safe and stopping my ...
- 3,633
1
vote
4
answers
11k
views
C++: Is a pointer to a vector going to cause memory issues?
I started to write a function which had a pointer to a vector as a parameter so that it could modify that vector to output results (as the actual return value was an error code), when I started to ...
2
votes
2
answers
299
views
Can you define node pointers in a base binary tree class?
I've created two separate binary tree classes, with some shared functions/variables and some that are not shared. So I have tried to abstract away the similarities in a base BinaryTree class.
class ...
- 31
0
votes
1
answer
122
views
What design pattern (if so) did I apply? How can I further improve it?
Suppose I have a program.c that needs element_123 to do some operations, and element_123 can be accessed by including agent.h
/*program.c*/
#include "agent.h"
uint32_t element_123 = 0;
...
- 185
2
votes
1
answer
2k
views
How to store a vector of smart pointers, except some of them are owned by another object?
I'm making a basic platformer game. I have a Game class as well as Level class. The game object holds a pointer to the current Level object. A level currently has a std::vector of GameObject raw ...
- 147
11
votes
3
answers
3k
views
What are the pros and cons of using a reference/pointer vs an ID
I'm writing in C++, but this problem applies to any language without GC and even to languages with a GC as well.
I have a structure in memory in which I create/add objects. The structure takes ...
- 293
65
votes
10
answers
21k
views
I never use pointers in my C++ code. Am I coding C++ wrong? [closed]
This question may sound strange to you, but I am learning C++ all by myself. I have nobody whom I could ask for mentoring and I would be very glad for some advice.
I have started recently to program ...
- 647