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How to fix casting a pointer to an integer?


How to fix casting a pointer to an integer?

By : Nirmal Tom
Date : November 20 2020, 07:00 PM
I wish this help you I'm writing a program that creates a doubly linked list out of an array. Here's the code so far: ,
How to fix casting a pointer to an integer?
code :
// temp->next = (struct Node*) newNode->data;
temp->next = newNode;


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Casting pointer & its address to integer pointer

Casting pointer & its address to integer pointer


By : Spilios Kakkas
Date : March 29 2020, 07:55 AM
this one helps. What is the difference between the following two assignments?
code :
int* q = (int*)p;
int* r = (int*)&p;
Casting to pointer from integer of different size

Casting to pointer from integer of different size


By : Prof Vegas
Date : March 29 2020, 07:55 AM
wish helps you The warning is here because pointers in your architecture are 16 bits, IIRC, but the integer you are casting is not 16 bits in size, but 8 bits. And casting a shorter integer into a pointer might inadvertently zero out the higher bits.
The immediate solution is to cast it first to 16 bit integer, and then to pointer:
code :
*(volatile uint8 *) (uint16) reg = val;
static inline uint8 init_reg(uint16 reg, uint8 val)
Type casting char pointer to integer pointer

Type casting char pointer to integer pointer


By : Vitaliy Vikulov
Date : March 29 2020, 07:55 AM
I hope this helps .
Since pointers are strongly typed, shouldn't a character pointer strictly point to a char data type?
why do i get a segmentation fault while casting void pointer to integer pointer

why do i get a segmentation fault while casting void pointer to integer pointer


By : pFlower
Date : March 29 2020, 07:55 AM
I wish did fix the issue. void * fun (int i)
This isn't the same i from main, rather a copy of it from a different location solely within the scope of this function fun. Using it outside the function scope through its address will result in undefined behavior. So, pass-by-reference instead and it will take the same i from main
Is reinterpret casting an integer to a pointer bijective if the integer is the same size as a pointer?

Is reinterpret casting an integer to a pointer bijective if the integer is the same size as a pointer?


By : Diego Usai
Date : March 29 2020, 07:55 AM
seems to work fine I don't think this is guaranteed. The Standard guarantees that a pointer converted to a suitably large integer and back will have its original value. From this follows that there is a mapping from pointers to a subset of the suitably large integers and back. What it does not imply is that for every suitably-large integer value, there is a corresponding pointer value…
As pointed out by DavisHerring in the comments below, this means that the mapping is injective, but does not have to be surjective and, thus, bijective. I believe what the standard implies in mathematical terms would be that there is a left-unique and left-total relation between pointers and integers, not a bijective function.
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