Compilare: user.cpp: In function ‘void trans()’: user.cpp:45: warning: unused variable ‘c’ user.cpp: In function ‘void read()’: user.cpp:112: warning: array subscript has type ‘char’ user.cpp:96: warning: unused variable ‘nr’ user.cpp:97: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:108: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:116: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int rez(int, int, char)’: user.cpp:27: warning: control reaches end of non-void function