added type decl for array of ptr. About to do check 15.

Signed-off-by: HUY PHAM <huypham612@gmail.com>
added ptr and arr decl for IdList, to be used for struct's fields and extern var.

Signed-off-by: HUY PHAM <huypham612@gmail.com>
finished part of 15a:  x = *ptr;

Signed-off-by: HUY PHAM <huypham612@gmail.com>
finished 15a.

Signed-off-by: HUY PHAM <huypham612@gmail.com>
finished 15b

Signed-off-by: HUY PHAM <huypham612@gmail.com>
finished 15c.

Signed-off-by: HUY PHAM <huypham612@gmail.com>