任意进制之间的转换和任意进制转二进制，其中有二进制、八进制、十进制及十六进制间的转化。Any conversion between hex and binary transfer any binary, including binary, octal, decimal and hexadecimal conversion between.-Any conversion between hex and binary transfer any binary, including binary, oc

字符表示的十六进制数转化为相应的整数    错误则返回    -1   -said the character hexadecimal number into the corresponding integer