Compilare: user.cpp: In function ‘int main()’: user.cpp:12: warning: unused variable ‘m’ user.cpp:12: warning: unused variable ‘i’ user.cpp:12: warning: unused variable ‘x’ user.cpp:12: warning: unused variable ‘y’ user.cpp:12: warning: unused variable ‘fluxcurent’ user.cpp:12: warning: unused variable ‘nod’ user.cpp:14: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:15: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:17: warning: ‘fluxmax’ is used uninitialized in this function