6 University of Electronic Science Technology of China(UESTC) Case 4 void f() register int i1,i2,i3,i4,i5,i6,i7,i8,i9,i10: register char *c1,*c2,*c3,*c4,*c5, *c6*c7*c8*c9*c10 extern inta_verylong_name; double dbl: intfunc ret_int; double func ret_double char *func ret char ptro Real-Time Systems Lab LIAO Yong6 Real-Time Systems Lab LIAO Yong University of Electronic Science & Technology of China (UESTC)  Case 4 void f() { register int i1,i2,i3,i4,i5,i6,i7,i8,i9,i10; register char *c1, *c2, *c3, *c4, *c5, *c6, *c7, *c8, *c9, *c10, extern inta_very_long_name; double dbl; intfunc_ret_int(); double func_ret_double(); char *func_ret_char_ptr();