Eroare de compilare: user.cpp: In member function ‘InParser& InParser::operator>>(int&)’: user.cpp:38:34: error: ‘isdigit’ was not declared in this scope while (!isdigit(c = read_ch()) && c != '-'); ^ user.cpp:46:33: error: ‘isdigit’ was not declared in this scope while (isdigit(c = read_ch())) { ^ user.cpp: In function ‘int main()’: user.cpp:72:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ograzi.out", "w", stdout); ^