All Questions
358
questions
-4
votes
1
answer
98
views
What functions can access a global variable that appears in the same file with them?
I asked ChatGPT and Google Bard a C++ question that "What functions can access a global variable that appears in the same file with them?"
They answered that "Any function within the ...
-2
votes
2
answers
83
views
How can I "globalize" struct methods?
I have a struct/class and i want to call some (or all) of its methods globally (without writing class_name::func_name() every time. I don't know what to replace on the using namespace foo; line. I ...
- 7
0
votes
1
answer
72
views
Import of global variable failed C++
I have dll with a code:
Dll.h:
#ifndef EXPORT
#define EXPORT __declspec(dllexport)
#endif
#ifndef IMPORT
#define IMPORT __declspec(dllimport)
#endif
#include <iostream>
#ifndef MY_GLOBALS_H
#...
- 165
-2
votes
2
answers
71
views
Global variables defined in Header. Other function call can see its changes
I have one .h file and two .cpp files:
global_var.h fun.cpp main.cpp
The details are shown below:
global_var.h:
extern int a;
void fun();
fun.cpp
#include <iostream>
#...
- 1
0
votes
2
answers
67
views
How to do this the right way? Declaring static object in function
The way I did it works, but feels like unbelievably bad programming.
void draw_display()
{
static DISPLAY mydisplay = DISPLAY(parameters);
mydisplay.set_orientation(0);
do something with ...
- 3
0
votes
0
answers
48
views
Are static class methods and variables visible form different modules (libs, dlls, exes)?
The case is quite simple - we had a discussion based on experiencing some linker issues, where colleagues of mine were stating, that we are unable to access the static methods and variables that are ...
- 288
-2
votes
3
answers
293
views
Are global variables actually global in their RAM share behavior? [closed]
In a multithreaded application, does each thread have its own copy of a given global variable for performance reasons, or can each thread only read/write into the same version?
If the answer is the ...
- 483
-3
votes
1
answer
65
views
Why is there no difference in the two results between the global array and the local array?
I turned global arrays into local arrays in the main() function to solve my homework for C++. I expected the program to produce an error, but it outputs the same result without any error.
What's the ...
- 17
6
votes
1
answer
152
views
How to access the unnamed namespace with scope resolution?
I have this:
#include <iostream>
using namespace std;
// Variable created inside namespace
namespace first
{
int val = 500;
}
namespace
{
int val = 400;
}
// Global variable
//int val ...
- 75
-1
votes
1
answer
63
views
global function and class reference
I want to send integer value in class to global function from main. How should I send it as a parameter,I am sending the parameters wrong
Tetris
{
private:
int num;
}
printBoard(Tetris &t);
...
- 1
0
votes
2
answers
241
views
dynamically allocate matrix using build-in vector library
I am facing problem in allocating matrix using vector library globally.
However, in my code, I am allocating vector as an array, which you can see below.
matrix = new double*[row*col];
for (int i = 0;...
- 11
1
vote
2
answers
55
views
Global constant declared but cannot be used in given function for declaring array length [duplicate]
See line 91 of code,
array<double,size1> poundData; //PROBLEM HERE array declared
Global constant size1 can be used to represent integer value 5 everywhere else in code but returns an error if ...
- 21
-2
votes
1
answer
122
views
c++ member function hides global function
This code snippet doesn't compile:
struct M {
int i;
int j;
};
void f(M& m) {
m.i++;
}
struct N {
M m;
void f(int i) {
f(m); // compilation error
}
};
clang says ...
- 537
1
vote
0
answers
309
views
Qt C++ How to create a global dynamic Object?
This problem has been bothering me for 2 days, I don't know how to implement it, thanks in advance
I Have defined 3 class Equipment, Equipment1 and Equipment2. Equipment is the base class and the 3 ...
- 11
0
votes
0
answers
159
views
Contents of a vector get deleted after every loop iteration
I found out from another thread that apparently the objects defined within a specific iteration of a loop get deleted after the iteration is over. Hence I ran into a problem when I delete an element ...
- 39