ud.c: (in function f)
ud.c:8:7: Variable y used before definition
ud.c:10:7: Variable z used before definition
ud.c:25:7: Variable z3 used before definition
ud.c:26:7: Variable z4 used before definition
ud.c:31:7: Variable z6 used before definition
ud.c:38:11: Variable j used before definition
ud.c:49:6: Variable i used before definition
ud.c:50:6: Variable z5 used before definition
ud.c:56:7: Variable z5 used before definition

Finished checking --- 9 code warnings, as expected

ud2.c: (in function g)
ud2.c:9:6: Unallocated storage y passed as out parameter to f1: y
ud2.c: (in function h)
ud2.c:20:7: Passed storage &x not completely defined: f2 (&x)
ud2.c:23:7: Variable y used before definition

Finished checking --- 3 code warnings, as expected