pqr_struct
struct pqr_struct *pqr = private;
struct pqr_struct *pqr = private;
struct pqr_struct *pqr = private;
struct pqr_struct pqr = { p, NULL, NULL };
struct pqr_struct pqr = { p, q, NULL };
struct pqr_struct pqr = { p, q, r };