Compilare: user.cpp: In function ‘int main()’: user.cpp:99: warning: array subscript has type ‘char’ user.cpp:101: warning: array subscript has type ‘char’ user.cpp:102: warning: array subscript has type ‘char’ user.cpp:66: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:68: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result