Compilare: user.cpp: In function ‘void bordare(int, int)’: user.cpp:31: warning: unused variable ‘j’ user.cpp: In function ‘void lee(int, int, int)’: user.cpp:43: warning: unused variable ‘drum’ user.cpp: In function ‘int read()’: user.cpp:99: warning: unused variable ‘line’ user.cpp:97: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:100: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:105: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result