get size allocated memory for ARRAY structs
my simple source code:
Code:
#include <stdio.h>
#include <stdlib.h>
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;
hundred_array_of_my_struct_type_3[3] = my_struct_data_3;
hundred_array_of_my_struct_type_3[4] = my_struct_data_3;
hundred_array_of_my_struct_type_3[5] = my_struct_data_3;
hundred_array_of_my_struct_type_3[6] = my_struct_data_3;
hundred_array_of_my_struct_type_3[7] = my_struct_data_3;
hundred_array_of_my_struct_type_3[8] = my_struct_data_3;
hundred_array_of_my_struct_type_3[9] = my_struct_data_3;
*/
printf("sizeof(data_int_1):\t\t%i\n",sizeof(data_int_1));
printf("sizeof(my_array_int_1):\t\t%i\n",sizeof(my_array_int_1));
printf("sizeof(my_struct_data_1):\t%i\n",sizeof(my_struct_data_1));
printf("sizeof(my_struct_data_2):\t%i\n",sizeof(my_struct_data_2));
printf("sizeof(my_struct_data_3):\t%i\n",sizeof(my_struct_data_3));
printf("sizeof(hundred_array_of_my_struct_type_3):\t%i\n\n",sizeof(*hundred_array_of_my_struct_type_3));
free(hundred_array_of_my_struct_type_3);
return 0;
}
In terminal I get this messages:
Code:
grytskiv@ZXDSL831II:~/memory$ gcc -ansi sizeof_struct.c -o sizeof_struct && ./sizeof_struct
sizeof(data_int_1): 4
sizeof(my_array_int_1): 400
sizeof(my_struct_data_1): 4
sizeof(my_struct_data_2): 8
sizeof(my_struct_data_3): 408
sizeof(hundred_array_of_my_struct_type_3): 408
grytskiv@ZXDSL831II:~/memory$
- all work successful, but how I can get size (sizeof) array. In my code I have array "hundred_array_of_my_struct_type_3". I allocated memory for this array, but can't get sizeof all array....
(my array is ten my own struct types)
HOW GET SIZE ARRAY IN BYTES???
I can do this "sizeof(my_array) * 10", but where I can get count elements in array?
Thanks
