Compilare: user.cpp: In function ‘int main()’: user.cpp:21:10: warning: unused variable ‘m’ [-Wunused-variable] int n, m, a, b, c; ^ user.cpp:21:13: warning: unused variable ‘a’ [-Wunused-variable] int n, m, a, b, c; ^ user.cpp:21:16: warning: unused variable ‘b’ [-Wunused-variable] int n, m, a, b, c; ^ user.cpp:21:19: warning: unused variable ‘c’ [-Wunused-variable] int n, m, a, b, c; ^