Compilare: user.cpp: In function ‘void read()’: user.cpp:16: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘void print()’: user.cpp:30: warning: array subscript has type ‘char’ user.cpp:30: warning: array subscript has type ‘char’ user.cpp:31: warning: array subscript has type ‘char’ user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void check()’: user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: array subscript has type ‘char’ user.cpp:51: warning: array subscript has type ‘char’ user.cpp:54: warning: array subscript has type ‘char’ user.cpp:41: warning: unused variable ‘j’ /tmp/ccibPdB9.o: In function `main': user.cpp:(.text+0x37): warning: the `gets' function is dangerous and should not be used.