Compilare: user.cpp: In function ‘void read()’: user.cpp:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void initialize()’: user.cpp:57: warning: array subscript has type ‘char’ user.cpp:61: warning: array subscript has type ‘char’ user.cpp:66: warning: array subscript has type ‘char’ user.cpp:68: warning: array subscript has type ‘char’ user.cpp:69: warning: array subscript has type ‘char’ user.cpp: In function ‘void print()’: user.cpp:88: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result