Compilare: user.cpp: In function ‘int main()’: user.cpp:39: warning: array subscript has type ‘char’ user.cpp:51: warning: array subscript has type ‘char’ user.cpp:63: warning: array subscript has type ‘char’ user.cpp:87: warning: array subscript has type ‘char’ user.cpp:97: warning: array subscript has type ‘char’ user.cpp:106: warning: array subscript has type ‘char’ user.cpp:106: warning: array subscript has type ‘char’ user.cpp:111: warning: array subscript has type ‘char’ user.cpp:11: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:12: 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:102: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:103: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result /tmp/ccvLWgEi.o: In function `main': user.cpp:(.text+0x260): warning: the `gets' function is dangerous and should not be used.