All Questions
Tagged with pass-by-reference arrays
457 questions
4
votes
3
answers
188
views
why does getaddrinfo() take the node, service and hints arguments as pointers? [duplicate]
int getaddrinfo(const char *node, // e.g. "www.example.com" or IP
const char *service, // e.g. "http" or port number
const struct addrinfo *...
- 41
0
votes
2
answers
147
views
Why does this function not modify the original array when passed as a parameter?
#include <stdio.h>
void modifyArray(int arr[]) {
arr = (int[]){6, 7, 8, 9, 10}; // Trying to modify the array
}
int main() {
int arr[] = {1, 2, 3, 4, 5};
modifyArray(arr);
for (...
- 499
2
votes
1
answer
78
views
How can I pass a file to a function and store the files' contents in an array?
How can I pass a file to a function and store the files' contents in an array?
I have an assignment for a beginner C++ class. The assignment (or at least the part I need help with) is to pass in 2 ...
0
votes
0
answers
50
views
Java Array behaving as call-by-reference only sometimes [duplicate]
I've encountered an interesting issue in Java - I don't know if it's a well known thing (I don't even know what to search for!).
Code:
public static void main(String[] args) {
String[] fruits = {&...
- 75
0
votes
2
answers
83
views
Why cant I modified the char array when passing it as an argument to the function and assigning it a new value?
void changeName(char* name) {
//other action
//strcpy(name, "String"); -- this working
name = "Marcus"; // -- this not working
}
int main() {
char name[10] ...
0
votes
1
answer
55
views
C Array elements all changing to the same value
I'm trying to populate an array of names using an input file, however the elements of my array all end up turning into the same value and I'm unsure why.
char* names[name_count];
for (int i = ...
- 41
0
votes
2
answers
186
views
const int * is incompatible with const int (*)[10]
I am trying to understand why the following code does not work:
void printArray(const int(*array)[10])
{
cout << sizeof(array) << endl;
}
int main()
{
const int arr[10] = { 1, 2 };...
- 131
-1
votes
3
answers
163
views
my C function is modifying a char array it shouldn't because it's deliberately out of scope
I wrote a little program in C that checks if a word of phrase is a palindrome. One function does the checking after calling another function to remove the spaces in a phrase. The app first asks the ...
- 11
-2
votes
1
answer
167
views
Array passed by reference is not updated in C++ [closed]
I'm trying to pass an array to a C++ class, in order the make the changes to the array objects visible outside the class. But it is not working. The changes to the Motor objects are lost after every ...
- 17k
0
votes
2
answers
147
views
Struct passed by value is modified in function in c
I have this code were i need to sort an array of struct without modifying it. I passed the array of struct by value and i used an int array with indexes to sort the struct. To sort the array i also ...
- 11
1
vote
1
answer
93
views
How are updates to var arrays handled in Swift memory (confused about CoW)
I have this function to do a quick select partition when sorting numbers in descending order. The function refers to arr defined outside its scope (partition is a nested func in another func).
My ...
- 3,100
0
votes
1
answer
83
views
Symfony ObjectProphecy treats array and object differently - can't change array which was initialised in setUp method
Related to this
I am trying out this test code
<?php
use Monolog\Test\TestCase;
use Prophecy\Prophecy\ObjectProphecy;
use Prophecy\Prophet;
class MyBar {
public int $bar = 0;
}
class MyFoo {
...
- 5
0
votes
1
answer
122
views
Add value to array in Symfony TestCase class in test function if the array was initialised in setUp method
Apologies if the question looks off, I am new to both Stack Overflow and php.
My class looks a bit like this:
final class MyClass extends TestCase
{
private MyService $myService;
private ...
- 5
0
votes
2
answers
109
views
how to use sizeof() for reference_to_array in c++ [duplicate]
How to use sizeof() to determine the size of a reference to an array?
I have declared an array in main() and used sizeof() to print its total size it has occupied.
And then I pass the array to a ...
0
votes
0
answers
32
views
How to avoid passing by reference inside of method (Java)? [duplicate]
I'm making my own Java matrix program for a linear algebra class and can't seem to stop passing my arrays by reference. I want each method to return a matrix (thus performing calculations based on the ...
- 1