Structures with structures

- When your program needs memory…you can allocate it on the fly.…That includes memory for any variable type array…or even a structure.…In this movie, I demonstrate how structures…can be created using pointers…with their memory allocated as the program runs.…In this code, storage for a structure is allocated.…The structure has to be defined first,…which happens at line six.…Remember, that a structure itself, isn't a variable.…It's simply a declaration of what…the contents of a structure would be.…

In this case, the members are month, day, year.…At line 11, a pointer variable…for that kind of structure is created.…The pointer is a memory location.…It's not the structure.…Storage for the structure is allocated at line 13,…courtesy of the malloc function.…See how the "sizeof" operator is used…to allocate enough storage for the structure itself.…

And the structure's name is used,…not the structure pointer variable.…Assuming that the structure is created,…lines 20 through 25 fill the structure.…Because the structure is referenced by a pointer,…