Compilare: user.cpp: In function ‘int main()’: user.cpp:20: warning: array subscript has type ‘char’ user.cpp:24: warning: array subscript has type ‘char’ user.cpp:26: warning: array subscript has type ‘char’ user.cpp:29: warning: array subscript has type ‘char’ user.cpp:56: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:9: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:10: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:11: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int an()’: user.cpp:130: warning: array subscript has type ‘char’ user.cpp:132: warning: array subscript has type ‘char’