Compilare: user.cpp: In function ‘bool ASCIIValidator(std::string)’: user.cpp:17:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < binary.length(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:37:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < binary.length(); i++) ^ user.cpp: In function ‘bool ASCIIValidator(std::string)’: user.cpp:21:23: warning: ‘number’ may be used uninitialized in this function [-Wmaybe-uninitialized] return number % 2 == 0; ^