Compilare: user.cpp: In function ‘int main()’: user.cpp:7:7: warning: unused variable ‘cmmdc’ [-Wunused-variable] int cmmdc; ^ user.cpp:8:13: warning: unused variable ‘ca’ [-Wunused-variable] int r,a,b,ca,cb; ^ user.cpp:8:16: warning: unused variable ‘cb’ [-Wunused-variable] int r,a,b,ca,cb; ^