Advertisements So let’s say I have this code: std::unique_ptr<int> ptr = std::make_unique<int>(10); int val = *std::move(ptr); // Anything using ptr after I know that std::move gives us an r-value reference to the unique_ptr, and I don’t think dereference will steal the resources from ptr like a move assignment operator would, so would this code be… Read More Will dereferencing an r-value reference do anything?
Advertisements I have a pointer to an array element which is used as an argument in a function and is moved along the array inside said function via the "++" operation. I would like the updated position of the pointer to be re-used after the function’s completion. The following code contains two attempts to solve… Read More C pointer arithmetic applied to function argument
Advertisements I looked in google and stumbled upon this post, but this does not quite answer my question (or maybe it does I just could not reach there my self). Dereference void pointer I am trying to create a function that would set pointers of unknown types. Basically: struct x{ type *links[LINK_SIZE]; // other data… Read More Is this deference of a void pointer correct?
Advertisements i create ptr pointer and set it to adress of x then print both of the adress why they are different each other ? #include <stdio.h> int main() { int *ptr; int x = 20; ptr = &x; printf("adress of x = %p\n", &x); printf("adress ptr = %p\n", &ptr); } Output : adress of… Read More why the address of the pointer and pointer value are different at C
Advertisements I wrote this code: #include <iostream> int main() { int x = 0; int *u, *k; { int y = 9; u = &y; } int z = 11; k = &z; std::cout << "u = " << u << std::endl; std::cout << "k = " << k << std::endl; std::cout << "*u =… Read More Unexpected Pointer Behavior in C++: Why does variable point to a local variable's value when another pointer assignment is commented out?
Advertisements Is it possible in C# to have multiple arrays at the same memory location with the arrays having different types? I have a large float array, and I need to convert it to a byte array in as short a time as possible. My Idea was to have a byte array that points to… Read More C# multiple arrays with the same memory
Advertisements I have an uin16_t array that I am trying to initialize all values to zero, an interesting thing happens when I reach array index 4. The garbage value in there is 58248, I try and set the value to 0 and it changes the memory address, interestingly by 58248. Here is an example of… Read More C Array Changing Location When Assigned Value
Advertisements char *s = "Hi"; printf("%s",s); s here is a pointer, I set the datatype to "%s", the output is "Hi", the string. int a = 1; int *p = &a; printf("%i", p); p here is also a pointer, I set the datatype to "%i", why the output is not "1", the integer? In the… Read More In C, for char *s = "Hi",the output of "printf("%s",s);" is "Hi", why for int a = 1, int *p=&a, the output of "printf("%i", p)" is not 1?
Advertisements I am currently reading the book "Understanding an Using C pointers" and I stumbled on the following example: int (*(arr1[])) = {(int[]){0,1,2}, (int[]) {3,4,5}, (int[]){6,7,8}} The author then shows a memory layout for arr1[0][0]…arr1[2][2] and it can be seen that the elements are stored in a contiguous region. I have two questions regarding this… Read More Array of pointers initialized with array of compound literals
Advertisements I found the following answer: Convert void* to double However, I am getting segmetation fault. Why is that? Code: void * p = (void *) 1234; double n = *(double *)p; >Solution : Pointer p is assigned to address 1234 that you chose at random?. You are then referencing a random address. It does… Read More Casting a void * to a double segmentation fault