Compilare: main.cpp: In function 'bool verf(long long int)': main.cpp:8:21: warning: unused variable 'ok' [-Wunused-variable] long long int n1=n,ok=1; ^~ main.cpp: In function 'long long int src(long long int, long long int, long long int)': main.cpp:27:17: warning: variable 'a' set but not used [-Wunused-but-set-variable] long long int a, b, m; ^ main.cpp:27:20: warning: variable 'b' set but not used [-Wunused-but-set-variable] long long int a, b, m; ^ main.cpp:38:2: warning: control reaches end of non-void function [-Wreturn-type] } ^