16进制转换 //字符串转换为16进制 string ls_hex = '',hex ='' char lch_hex[0 to 15] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'} int li_d,i character ac_d