从www.CppReference.com打包的C++参考手册

																				  				  "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">								  unsigned				  																				  				  				  								  				    cppreference.com > 				    "index.html">C/C++ Keywords > 				    "unsigned.html">unsigned				  								  				    unsigned				  								  The unsigned keyword is a data type modifier that is usually used				  to declare unsigned int variables. See the				  data types page.								  				    Related topics:				  								  				    bool				    char				    double				    float				    int				    short				    signed				    void				    wchar_t