Compilare: user.cpp: In function ‘int main()’: user.cpp:29: warning: array subscript has type ‘char’ user.cpp:35: warning: array subscript has type ‘char’ user.cpp:44: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:68: warning: array subscript has type ‘char’ user.cpp:68: warning: array subscript has type ‘char’ user.cpp:73: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.cpp:15: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result 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 ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result