Borderou de evaluare (job #435062)

Compilare: user.cpp: In member function ‘void bignumber::add(int)’: user.cpp:22:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In member function ‘bool bignumber::check()’: user.cpp:32:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:33:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In member function ‘std::string bignumber::to_string()’: user.cpp:39:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int main()’: user.cpp:47:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:48:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]