Borderou de evaluare (job #146712)

Compilare: user.cpp: In function ‘std::string tolower(const string&)’: user.cpp:11:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int count_alnum(const string&)’: user.cpp:21:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int count_dig(const string&)’: user.cpp:29:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int count_if(const string&, const char&)’: user.cpp:37:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int count_if(const string&, const string&)’: user.cpp:44:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool validate_user()’: user.cpp:69:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool validate_pass()’: user.cpp:73:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool validate_port()’: user.cpp:77:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool validate_path()’: user.cpp:81:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool to_int(const string&)’: user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool is_int(const string&)’: user.cpp:100:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘bool validate_name()’: user.cpp:108:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:114:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:133:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int main()’: user.cpp:184:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]