All Questions
15,922
questions
-1
votes
0
answers
59
views
Why is constructor called, not overloaded operator=? [duplicate]
In the following code (also here: godbolt)
Why is the constructor for myParam called in the assignment in main() and not the operator= overload?
What can I do to force the assignment?
Thanks!
#include ...
-11
votes
0
answers
63
views
What's the difference between 'ClassName* p' and 'ClassName p'? [duplicate]
Please explain to me the difference between Player p and Player* p.
Why should I write it like this:
Player *p = new Player(playwin, 1, 1, '#');
while (p->getmv() != 'x')
{
p->display();
...
1
vote
1
answer
80
views
How do I use std::reference_wrapper to store the reference in an std::unordered_map?
I'm trying to learn the use of std::reference_wrapper and std::ref and the use cases of it.
Here is a sample code I wrote. Please help me solve the compilation error. And it would be great if you can ...
- 13
-1
votes
1
answer
58
views
How to loop through function and value of different class in c++ [duplicate]
So I am trying to basically do a* on a task planner, coz action typically have cost(risk, time, resources spent etc) and reward(effects) so I want to put it as an a* problem but for that I made each ...
- 1
0
votes
0
answers
71
views
In C++, when is it better to use a class with a state and an "execute" method, vs just a function? [closed]
My question is about code design in general, but consider the specific context of a numerical integration tool.
Option 1: a class with a state, setters, accessors, and an execute method.
class ...
- 41
-2
votes
0
answers
80
views
Are there objects for primitive data types? [duplicate]
If the object represents a data type, is the variable for a primitive data type like an integer also an object representing this type, or do objects not represent primitive data types?
// Let's assume ...
1
vote
0
answers
47
views
How am i able to change constant class member? [duplicate]
I came up with the way to change members of constant class and i don't have an explanation for it.
I came up with this example of code:
#include <iostream>
class Cool_class
{
public:
int ...
2
votes
1
answer
175
views
Explicit this member function use accepted by msvc but rejected by clang and gcc
I wrote the following program that compiles with msvc but rejected by clang and gcc. It uses explicit object member function. Demo.
#include <iostream>
struct C{
int f(this int);
};
...
- 1,118
-3
votes
2
answers
60
views
How can i select one of declared structure and make alias? [closed]
enum class Color { RED, BLACK };
enum class TreeModel { AVL, RED_BACK, SPLAY }
struct BasicNode {
BasicNode* left;
BasicNode* right;
BasicNode* parent;
};
struct SplayNode : BasicNode {
...
- 1
0
votes
2
answers
54
views
class keyword for UPROPERTY()
I'm new to UnrealEngine and studying C++ development in scope of games. For now I read a tutorial where I should create a AMyPawn and UPawnMovementComponent to attach it then.
Here is the definition ...
- 1
0
votes
1
answer
84
views
Type conversion in user defined class in c++
I made a matrix class in c++
namespace LinAlg {
template <typename T> class Matrix {
public:
Matrix();
Matrix(const uint64_t &rows, const uint64_t &cols);
template <typename P&...
- 52
-7
votes
1
answer
93
views
can anyone tell me how can I create multiple objects using vector without specifying the length of vector
I tried to do it using the vector<string> and iterating through it to create the object but while assigning them value i am getting error
#include <iostream>
#include <string>
#...
- 1
-1
votes
0
answers
39
views
How to make a C++ struct that can have multiple independent static variables for each object of the struct? [duplicate]
I'm currently working on a Predator/Prey simulation in C++, and I'd like to keep track of certain stats (number born, number alive, and number died, specifically) for each one of various types (Animal,...
-1
votes
1
answer
67
views
How to use a non-static class member on all files?
Title. I need to access a class member that has to be non-static from another file. Example:
// a.cpp
#include "h.h"
int main() {
B num1(1);
B num2(2);
return 0;
}
// b....
1
vote
1
answer
45
views
c++ changing the data within the object, it returns to the original state [duplicate]
I am trying to develop a trade simulation for practical purposes.
At the end of the code, I see that the values within the object have changed, but when it returns, it continues with the initial data. ...
