Compilare: user.c:3:1: warning: return type defaults to ‘int’ [enabled by default] fact(int k){ ^ user.c:10:1: warning: return type defaults to ‘int’ [enabled by default] cabane(FILE*w,FILE*e){ ^ user.c: In function ‘main’: user.c:32:4: warning: format ‘%lld’ expects argument of type ‘long long int *’, but argument 3 has type ‘long int *’ [-Wformat=] fscanf(f,"%lld",&l); ^ user.c:35:6: warning: variable ‘h’ set but not used [-Wunused-but-set-variable] FILE*h; ^ user.c: In function ‘cabane’: user.c:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^