Compilare: user.cpp: In function ‘int main()’: user.cpp:169:20: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FIN("retea.in"); ^ user.cpp:170:22: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FOUT("retea.out"); ^ user.cpp: In function ‘char getChar()’: user.cpp:41:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buffer, 1, BS, stdin ); ^