All Questions
238
questions
0
votes
1
answer
55
views
Why I didnot get Multiple definition Error?
#include <stdio.h>
#define MAX 5
static int data = 10;
int increment(void *);
int increment(void *ptr)
{
int *p = ptr;
static int data =15;
for (int loop=0; loop < MAX; loop++...
- 126
-1
votes
1
answer
90
views
Global file pointer in C
I'm having a problem with a global file pointer in C with Visual Studio 2022 in a solution involving a large number of files that are compiled and linked using the "Build" command.
Based on ...
- 522
-2
votes
2
answers
69
views
Shell script for finding global variables
How would one write a shell script that finds all the global variables in a given C program?
I don't need a long line like
global_vars=$(grep -E '^[[:space:]]*[a-zA-Z_][a-zA-Z0-9_]*[[:space:]]+[a-zA-...
4
votes
2
answers
156
views
Should I use global variables in recursion
I created a function in C to find the shortest path out of a triangle maze using recursion. I use 2 global variables in the function, which I want to get rid of because I know that global variables ...
- 59
1
vote
3
answers
414
views
Scope of a structure in C language
Could someone explain in simple terms what is meant by this?
The scope of a structure begins at its appearance in a type specifier, and persists to the end of the translation unit (for declarations ...
- 421
0
votes
1
answer
67
views
static variables not initialized in C [closed]
In a C program I have this code in a file. It wants to use a static global variable to control verbose output. But the variable is not what I assigned, so I started to play.
static int _varA = 0;
...
- 434
1
vote
1
answer
92
views
Storage of uninitialized global static variable in C programming
As I learn, uninitialized global static variable take memory space in bss. But while i am declaring a global static variable in my c program, the size of the bss is not increasing.
I tried:
#include&...
1
vote
3
answers
109
views
Initializing global arrays after declaration in C
I need a global array whose size depends on the user. The problem is I don't know how to declare an array globally but initialize it later after getting a user input to know the size. I am not even ...
- 11
-2
votes
4
answers
495
views
Static variable in global and local scope
I want to know what is the difference between declaring a static variable locally and globally, because in below example.
If results do not impact, then why we have two scopes for static?
#include <...
- 1
0
votes
1
answer
41
views
gcc complaining "multiple definition of 'funname' ", then how to declare a global character array? [duplicate]
I have a header error.h, and this is where I want to declare my global character array funname.
My idea is to declare funname in error.h, and include this header in all of my *.c files. funname stores ...
- 128
2
votes
1
answer
72
views
C Pointer assignments - global
The following code:
#include<stdio.h>
#include<stdlib.h>
char *msg = "Hello, World!";
char *p;
p = msg;
int main()
{
puts(msg);
return EXIT_SUCCESS;
}
gives an error ...
- 21
1
vote
2
answers
929
views
Why and where to use a global variable and a static global variable in C?
I have read about global and local variables and static keyword, but i dont know which is the difference between something like this:
int x; //Global variable
int main(){
//Code...
}
And this:
...
- 327
0
votes
0
answers
43
views
Why is the actual memory usage in task manager different from the theoretical memory usage for C?
#include <stdio.h>
#include <unistd.h>
typedef struct kk {
char k[1000000];
} uuuu;
uuuu k[1000];
int main() {
sleep(100);
return 0;
}
The theoretical memory usage for this program ...
- 13
-2
votes
1
answer
107
views
Is it possible to pass a global char variable as a parameter in a function?
So I have a global variable called char words[10]. I would like to pass it as a parameter as in a function.
This is the code I have so far and it does not compile obviously. I just do not know how ...
- 1
1
vote
0
answers
140
views
How to determine in Clang API if a reference is to a global?
Using the Clang Python API I am trying to figure out if a reference to a C identifier is to a global definition - i.e. the scope of the identifier is more than to just a single file or sub-part ...
- 11