pointer « size « C Array Q&A

1. C pointers : pointing to an array of fixed size    stackoverflow.com

This question goes out to the C gurus out there: In C, it is possible to declare a pointer as follows:

char (* p)[10];

2. User defined array sizes in C    stackoverflow.com

I'm reading through "Illustrated C" and the first exercise question asks:

Program MATMUL multiplies matrices of fixed size. Make the program deal with any specified sizes.

3. C array of pointers on top level without size declaration    stackoverflow.com

This code compiles and outputs like I would expect.

#include <stdio.h>

int* ar[];

int main(void) {    
    ar[0] = 97;
    ar[1] = 98;
   ...

4. How does an array pointer store its size?    stackoverflow.com

#include "stdio.h"

#define COUNT(a) (sizeof(a) / sizeof(*(a)))

void test(int b[]) {
 printf("2, count:%d\n", COUNT(b));
}

int main(int argc, char *argv[]) {
 int a[] = { 1,2,3 };

 printf("1, count:%d\n", COUNT(a));
 test(a);

 return 0;
}

5. How to get array size from a pointer?    bytes.com

It's part of a test and I'm stumped. There is a function void foo(char **x) The function signature is given and cannot be changed, so no passing of other values. The test case involves defining this variable: char *y[] = { /* bunch of stuff */ } and calling foo(y) In the above, "bunch of stuff" is a series of triplets, ...

6. getting size of pointer to an array    bytes.com

Guys, I've got the below codes but having difficulty in reading the correct size of each data in an array of pointers. Can somebody help me out. :::: //================================================= static char* SomeName[]= { (char*) "abc", (char*) "cdfdfnttel", (char*) "ground1234", (char*) "calc", (char*) "unwanted", (char*) "data", (char*) "anything", }; //==== my code=================== void SomeFunction(/*some parameters*/) { int b4SizeOfDatainList ... ... b4indexFound = ...

7. Changing size of array of pointers    cboard.cprogramming.com

8. How to Determine size of array (non-char) from its Pointer?    cboard.cprogramming.com

I don't know what you mean by saying the system knows about how big the array is. Some systems allow you to retrieve that information from a pointer to the first element of an array and some systems don't. Do what was previously suggested. Have your function accept a pointer and a size of the array. As for your last question, ...

9. dereferencing void pointer of known size to add value to an array    codeproject.com

The user isn't trying to analyse memory in case of a crash or other program weirdness - I've got no problem with that. However everyday I have to work through "optimised" "generic" code that makes all sorts of assumptions about the memory layout of the object it manages. As a thought experiment what happens if the user of the code you've ...