Compilare: user.cpp: In function ‘int main()’: user.cpp:55:17: warning: NULL used in arithmetic [-Wpointer-arith] while(s[i]!=NULL){ ^ user.cpp:45:11: warning: unused variable ‘n’ [-Wunused-variable] long n,i=0,m,x,t; ^ user.cpp:52:11: warning: unused variable ‘p’ [-Wunused-variable] node *p=new node; ^ user.cpp: In function ‘long int search_deschis(node*, long int)’: user.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘long int search_inchis(node*, long int)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^