Compilare: user.cpp: In function ‘long long int prime(int)’: user.cpp:14:9: warning: unused variable ‘v’ [-Wunused-variable] int v[100001],tst; ^ user.cpp:14:19: warning: unused variable ‘tst’ [-Wunused-variable] int v[100001],tst; ^ user.cpp:15:9: warning: unused variable ‘contor’ [-Wunused-variable] int contor,isprim,i; ^ user.cpp:15:16: warning: unused variable ‘isprim’ [-Wunused-variable] int contor,isprim,i; ^ user.cpp:15:23: warning: unused variable ‘i’ [-Wunused-variable] int contor,isprim,i; ^ user.cpp:17:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:21:15: warning: unused variable ‘a’ [-Wunused-variable] long long a; ^