teatru.cpp: In function 'void read()': teatru.cpp:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result teatru.cpp:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result teatru.cpp:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result teatru.cpp: In function 'void find_n()': teatru.cpp:22: warning: array subscript has type 'char' teatru.cpp:29: warning: array subscript has type 'char' teatru.cpp:30: warning: array subscript has type 'char' teatru.cpp:31: warning: array subscript has type 'char' teatru.cpp:37: warning: array subscript has type 'char' teatru.cpp:38: warning: array subscript has type 'char' teatru.cpp: In function 'void write()': teatru.cpp:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result