typedef struct
{
   int a, b;
   float c;
   STRING* d;
} STRUCT_A;

typedef struct
{
   int e, f;
   BMAP* h;
   
   STRUCT_A aaa, bbb;
} STRUCT_B;

void main ()
{
   STRUCT_B test;
   test.aaa.a = 10;
   test.bbb.b = 2;
   test.aaa.a *= test.bbb.b;

   // works
   printf("test.aaa.a = %d", test.aaa.a);
}