Compilare: user.cpp: In function ‘int main()’: user.cpp:7:20: warning: unused variable ‘c’ [-Wunused-variable] long int a, b, c, d=0, e=0, f=0, g=0, h=0; ^ user.cpp:7:28: warning: variable ‘e’ set but not used [-Wunused-but-set-variable] long int a, b, c, d=0, e=0, f=0, g=0, h=0; ^ user.cpp:7:33: warning: unused variable ‘f’ [-Wunused-variable] long int a, b, c, d=0, e=0, f=0, g=0, h=0; ^ user.cpp:7:43: warning: unused variable ‘h’ [-Wunused-variable] long int a, b, c, d=0, e=0, f=0, g=0, h=0; ^