Eroare de compilare: user.c: In function ‘cmp’: user.c:13:23: warning: dereferencing ‘void *’ pointer [enabled by default] return((muchie *)a->cost < (muchie *)b->cost); ^ user.c:13:23: error: request for member ‘cost’ in something not a structure or union user.c:13:43: warning: dereferencing ‘void *’ pointer [enabled by default] return((muchie *)a->cost < (muchie *)b->cost); ^ user.c:13:43: error: request for member ‘cost’ in something not a structure or union user.c: In function ‘main’: user.c:37:5: warning: passing argument 4 of ‘qsort’ from incompatible pointer type [enabled by default] qsort(graf,m,sizeof(muchie),cmp); ^ In file included from user.c:1:0: /usr/include/stdlib.h:756:13: note: expected ‘__compar_fn_t’ but argument is of type ‘int (*)(void *, void *)’ extern void qsort (void *__base, size_t __nmemb, size_t __size, ^ user.c:39:9: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int c[200000]; ^ user.c: In function ‘cmp’: user.c:14:1: warning: control reaches end of non-void function [-Wreturn-type] } ^