Compilare: user.cpp: In function ‘int main()’: user.cpp:15: warning: array subscript has type ‘char’ user.cpp:15: warning: array subscript has type ‘char’ user.cpp:18: warning: array subscript has type ‘char’ user.cpp:23: warning: array subscript has type ‘char’ user.cpp:23: warning: array subscript has type ‘char’ user.cpp:24: warning: array subscript has type ‘char’ user.cpp:7: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: 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 ‘int scanf(const char*, ...)’, 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:9: warning: ‘x’ may be used uninitialized in this function user.cpp:9: warning: ‘y’ may be used uninitialized in this function