Compilare: user.cpp: In function ‘bool ext(cerc, cerc)’: user.cpp:22:10: warning: variable ‘dist’ set but not used [-Wunused-but-set-variable] { double dist; ^ user.cpp: In function ‘int main()’: user.cpp:31:10: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] bool ok; ^ user.cpp:39:9: warning: variable ‘rz’ set but not used [-Wunused-but-set-variable] int rz,ct; ^