将 unsiged char 转换成对应的十六进制字符用以显示出来如 unsiged char a[]={0x00,0x01,0x30,0x38}转化为“00013038”

 1 int CEnCryptionAndDeCryptionDlg::Byte2Hex(const unsigned  char* input,unsigned long inLen,
 2                                                     unsigned char* outPut,unsigned long* outLen)
 3 {
 4     static const char* num="0123456789ABCDEF";
 5     unsigned long i=0;
 6     unsigned char *p=outPut;
 7 
 8     if (*outLen<inLen*2)
 9     {
10         *outLen=inLen*2;
11         return -1;
12     }
13 
14     for (int i=0;i<inLen;i++)
15     {
16         *p++=num[input[i]>>4];
17         *p++=num[input[i]&0x0f];
18     }
19     *outLen=p-outPut;
20     return 0;
21 
22 }

CString outPut=outPut;

以上代码参考自http://bbs.csdn.net/topics/370151117