Compilare: user.cpp: In function ‘int howMany(Nod*, char*)’: user.cpp:50:9: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int nr = 0; ^ user.cpp: In function ‘int prefix(Nod*, char*)’: user.cpp:63:9: warning: variable ‘pref’ set but not used [-Wunused-but-set-variable] int pref = p->nrp; ^ user.cpp: In function ‘int howMany(Nod*, char*)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int prefix(Nod*, char*)’: user.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:80:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s\n", cuv); ^