23.c++-16进制转换成字符串(随手源码)

inline int hex_to_str(const unsigned char *hex, int hexlen, char *str, int &strlen)
{
int outhexlen = hexlen * 2 + 1;

if (strlen < outhexlen)
{
return -1;
}

strlen = outhexlen;

for (int i = 0; i < hexlen; ++i)
{
_snprintf(str + 2*i, 3, "%02X", (unsigned char)hex[i]);//注意是unsigned char!
}

return strlen;
}

int _tmain(int argc, _TCHAR* argv[])
{
UCHAR SigBytes[24] = {0,1,2,3,4,5,6};
char szByte[50] = {0};
int nLen = 50;
hex_to_str(SigBytes, 24, szByte, nLen);

return 0;
}