size « memory « C Array Q&A

1. How do I determine the size of my array in C?    stackoverflow.com

i.e., the number of elements the array can hold?

2. How can I get the size of an array from a pointer in C?    stackoverflow.com

I've allocated an "array" of mystruct of size n like this:

if (NULL == (p = calloc(sizeof(struct mystruct) * n,1))) {
 /* handle error */
}

3. How do I allocate memory and determine array sizes dynamically in C?    stackoverflow.com

I am trying to teach myself C from a python background. My current mini-problem is trying to do less hard-coding of things like array lengths and allocate memory dynamically based ...

4. free(): invalid next size (fast) - Freeing a struct of string array in c    stackoverflow.com

Hello I am trying to free a linked list I have created and I'm having some real trouble. My System is Ubuntu 10.10 and I am using the gcc compiler. I have ...

5. get size allocated memory for ARRAY structs    cboard.cprogramming.com

#include #include int main() { int data_int_1; int my_array_int_1[100]; struct my_struct_type_1 { int data_int_1; } my_struct_data_1; struct my_struct_type_2 { int data_int_1; int data_int_2; } my_struct_data_2; struct my_struct_type_3 { int data_int_1; int data_int_2; int my_array_int_2[100]; } my_struct_data_3; struct my_struct_type_3 *hundred_array_of_my_struct_type_3; hundred_array_of_my_struct_type_3 = malloc(sizeof(my_struct_data_3) * 10); /* is work fine: */ /* hundred_array_of_my_struct_type_3[0] = my_struct_data_3; hundred_array_of_my_struct_type_3[1] = my_struct_data_3; hundred_array_of_my_struct_type_3[2] = my_struct_data_3; ...

6. total size of dynamic memory allocated array    cboard.cprogramming.com

Of course there is, you can dynamically allocate an array with only a little bit more work than a static array. But if you try to use the sizeof operator on the entire dynamic array then the value will most likely be 4, which is the size of a pointer. sizeof is determined at compile time and the size of a ...

7. Running out of memory due to large fixed size arrays    forums.devshed.com

problem resolved... For those of you who might be wondering what caused the error: By moving the structure and array declarations out of my main routine (which I should have done earlier anyways) the problem was resolved. I guess putting alot of variable and array declarations in main() we can hog a lot of memory. Good to know...

8. unknown array size + dynamic memory allocation    daniweb.com

#include #include #define CHUNKSIZE 5 int main ( void ) { unsigned long *array = 0; size_t capacity = 0; size_t n = 0; unsigned long value; size_t i; while ( scanf ( "%lu", &value ) == 1 ) { if ( n == capacity ) { unsigned long *save; capacity += CHUNKSIZE; save = realloc ( array, capacity ...