Compilare: user.cpp: In member function ‘void InputReader::adv()’: user.cpp:25:54: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, sizeof(char), BUFF_SIZE, fin); ^ user.cpp: In function ‘int main()’: user.cpp:137:56: warning: ‘poz2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << maxim << ' ' << poz1 << ' ' << poz2 << '\n'; ^~~~ user.cpp:137:41: warning: ‘poz1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << maxim << ' ' << poz1 << ' ' << poz2 << '\n'; ^~~