If array
is always the first in your struct, you can simply access it by casting pointers. There is no need for a struct Element
. You data structure can store void pointers.
typedef struct {
char array[32];
} A;
typedef struct {
void* elements;
size_t elementSize;
size_t num;
} Vector;
char* getArrayPtr(Vector* v, int i) {
return (char*)(v->elements) + v->elementSize*i;
}
int main()
{
A* pa = malloc(10*sizeof(A));
pa[3].array[0] = 's';
Vector v;
v.elements = pa;
v.num = 10;
v.elementSize = sizeof(A);
printf("%s\n", getArrayPtr(&v, 3));
}