All Questions
296
questions
0
votes
1
answer
90
views
Reference on size 1 std vector from coefficient reference
Let's say we have a
class X
{
private:
std::vector<double> & values_;
public:
X(std::vector<double> & values) : values_(values) {}
};
and that I want to create a class Y ...
- 147
1
vote
1
answer
127
views
c++ undefined behavior of a reference to a base class
Please see my code. I have a base class "System" and a derived class "AdvancedSystem". When accessing the base class reference the output is undefined and random, and i have no ...
- 165
0
votes
1
answer
70
views
Const-correctness with getters of vector of non-pointers [duplicate]
I have a quick question regarding const-correctness for getters of vector of non-pointers.
Basically, I have this class with a non-const getter and a const getter for m_Vertices:
class Mesh
{
public:
...
0
votes
0
answers
55
views
How can I avoid nested vectors and self referencing structs?
I have the following problem to which I would like to find a Rust-idiomatic solution.
The "step 0" of what I want to do is the following
struct Point {
x: f32,
y: f32
}
struct ...
- 683
-1
votes
1
answer
86
views
Not able to add pointer to a vector in C++
I am trying to implement a grid system to detect colission between tanks in a game.
My goal is to have around 40 cells which all have a vector with tank pointers. The tank should be in the right grid ...
-2
votes
1
answer
81
views
C++ Inheritance and passing vector references
Given the following code compiles and runs with no error
class A {
public:
std::vector<int> i;
void add(std::vector<int> &v) { i = v; }
};
class B {
public:
B(A &a, std::...
- 17
0
votes
1
answer
167
views
Reference to vector as class member
I tried to pass a vector as a class member by reference but I seem to have passed it by value.
So I am making a class that has a function that can change the position of an element in a vector. The ...
- 25
0
votes
1
answer
61
views
C++ vector not saving the parent of an object
Suppose I Have class A like this
class A {
public:int num;
public:A* parent;
A(){};
A::A (const A &s)
{
this->num = s.num;
}
};
Inside the main function I ...
2
votes
1
answer
481
views
How to get mutable reference to object inside vec inside a struct in rust?
I have a very basic problem in a rust relating to mutability of objects inside a vector. I have a need to get a mutable reference to an object from within a method of the struct as follows:
struct ...
- 1,300
0
votes
0
answers
115
views
I made function that returns vector of struct via reference. How to access its members w/o making a copy?
I'd like to print members of structure from static vector created inside a function.
It might sound convoluted, so lets bring an example.
struct Person
{
std::string name{};
int age{};
};
std::...
- 23
0
votes
1
answer
442
views
C++ Undefined referenc to giv an vector<vector <char>> to an function [duplicate]
i have this complex error respectively it looks complex. I think I have a mistake at may transfer parameters. But I don't know what is the mistake. At the web I found this syntax and dont understand ...
0
votes
1
answer
1k
views
Proper way to share references to Vec between threads
I am new to rust and I am attempting to create a Vec that will live on the main thread, and pass a reference to another thread, which then pushes members onto the vector, for the main thread to use.
...
1
vote
0
answers
13
views
How do I pass a reference to a class object from a range based for loop to a function argument?
I have my parser checking through a user input string, and comparing each individual word to an item or room name. These items and rooms are stored as class objects in a vector. I want to be sure that ...
0
votes
1
answer
158
views
How I can create a reference of type std::vector<A>& from std::vector<B> where B is a class inherited from A
Project Structure
I have a project structure like this :
myProject
├── myLib
│ ├── DataStructures.hpp/cpp
│ └── DeviceManager.hpp/cpp
└── QtDeviceView.hpp/cpp
myLib/Datastructures:
struct Device {
...
- 1,280
0
votes
0
answers
185
views
C++ const-reference loop over a vector containing map
#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <unordered_map>
#include <any>
using namespace std;
using MapAny = std::...
- 1,708