Compilare: user.cpp: In function ‘int main()’: user.cpp:37: warning: unused variable ‘e’ user.cpp:37: warning: unused variable ‘c1’ user.cpp:37: warning: unused variable ‘c2’ user.cpp:37: warning: unused variable ‘c3’ user.cpp:37: warning: unused variable ‘i’ user.cpp: In function ‘void euclid(long int, long int, long int&, long int&, long int&)’: user.cpp:9: warning: ‘u3’ may be used uninitialized in this function user.cpp:9: warning: ‘v3’ may be used uninitialized in this function