Compilare: user.cpp: In function ‘int main()’: user.cpp:7: warning: unused variable ‘coada’ user.cpp:7: warning: unused variable ‘costmin’ user.cpp:7: warning: unused variable ‘drum’ user.cpp:7: warning: unused variable ‘prev’ user.cpp:5: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:6: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result