#include <stdio.h>
#include <stdlib.h>

typedef struct {
	int a;
	int b;
}subTwo;

typedef struct{
	subTwo *sub;
}subOne;

typedef struct{
	subOne *sub;
}mainStruct;

void createStruct(mainStruct **s0){
	printf("sizeof mainStruct %d\n",sizeof(mainStruct));
	(*s0) = (mainStruct *)malloc(sizeof(mainStruct));
	(*s0)->sub = (subOne *)malloc(sizeof(subOne));
	(*s0)->sub->sub = (subTwo *)malloc(sizeof(subTwo));
	printf("sizeof subTwo %d\n",sizeof(subTwo));

}

int main(){

	mainStruct *s0;
	createStruct(&s0);
	s0->sub->sub->a = 42;
	printf("a = %d\n", s0->sub->sub->a);
	
	return 0;
}