Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘a’ [-Wunused-variable] long n,a,b,c,result; ^ user.cpp:10:11: warning: unused variable ‘b’ [-Wunused-variable] long n,a,b,c,result; ^ user.cpp:10:13: warning: unused variable ‘c’ [-Wunused-variable] long n,a,b,c,result; ^ user.cpp:10:15: warning: unused variable ‘result’ [-Wunused-variable] long n,a,b,c,result; ^