Compilare: user.cpp: In function ‘int main()’: user.cpp:106:9: warning: unused variable ‘m’ [-Wunused-variable] int m = n * (n + 1) / 2, s = 1, nr = 0; ^ user.cpp:106:30: warning: unused variable ‘s’ [-Wunused-variable] int m = n * (n + 1) / 2, s = 1, nr = 0; ^ user.cpp:106:37: warning: unused variable ‘nr’ [-Wunused-variable] int m = n * (n + 1) / 2, s = 1, nr = 0; ^