Borderou de evaluare (job #501448)

Compilare: user.cpp: In member function 'char input_parser::next()': user.cpp:43:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In member function 'void output_parser::print(int)': user.cpp:104:21: warning: array subscript has type 'char' [-Wchar-subscripts] user.cpp: In member function 'void output_parser::print(unsigned int)': user.cpp:113:21: warning: array subscript has type 'char' [-Wchar-subscripts] user.cpp: In function 'int main()': user.cpp:142:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:150:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:156:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In member function 'char input_parser::next()': user.cpp:44:65: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result]