How to get struct array (or pointer) that is part of another struct? in C

Question

In the following code:

typedef struct 
{
    uint32_t variable_1;
}struct_1;

typedef struct 
{
    uint32_t variable_2;
}struct_2;

typedef struct 
{
    struct_1 struct_1_var;
    struct_2 struct_2_var;
}struct_all;


struct_all variable_t[10];

struct_1* struct_1_var; //how to get this to point to an array of struct_1 that's inside variable_t?

Basically, I want to get an struct_1[10] or struct_2[10] that that is part of variable_t[10].

Answer 1

You can't, because there isn't an array of either struct_1 s or struct_2 s in variable_t to point to . There is an array of elements, each of which has a struct_1 and a struct_2 .

If you want an array of just one type of the other of the values in variable_t , you'll need to copy them out one at a time into a new array.