Compilare: user.cpp: In function ‘bool isext(cerc, cerc)’: user.cpp:11: warning: unused variable ‘dist’ user.cpp:12: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:15: warning: unused variable ‘i’ user.cpp:15: warning: unused variable ‘j’ user.cpp:15: warning: unused variable ‘x’ user.cpp:15: warning: unused variable ‘y’ user.cpp:15: warning: unused variable ‘r’ user.cpp:16: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result