Convert to hex

[mircea213]

Hello everybody!
I have a big question about conversion from a base to a base.

Yesterday a write a mini program that comunicate throw UDP with a server.
When I receive information from server I must convert data to int, so I try to convert data to hex and than to unsigned int. I can't convert from data to hex.

That is what I create:

char *ToHex(char *str)
{
    char *newstr = new char[(strlen(str)*2)+1];
    char *cpold = str;
    char *cpnew = newstr;

    while('\0' != *cpold)
    {
        sprintf(cpnew, "%02X", (char)(*cpold++));
        cpnew+=2;
    }
    *(cpnew) = NULL;
    return(newstr);
}

This code must convert string to hexadecimal.
All work fine, but this script doesn't convert to C1, or DA, it convert to numbers and to FF.

Can anyone help me?

[mircea213]

Up!

[guestgulkan]

What does this data format look like??

[mircea213]

One example: Ÿôe And my script convert like this 10 FFFFFF9F FFFFFFF4 65.
It must be 10 F9 F4 65

I resolve my problem. Was easy, but I'm happy now.

[guestgulkan]

What was it???

I was about to post something about sign extension (printing as negative hexadecimal numbers
for values >= 80 hex)

[mircea213]

10 FFFFFF9F FFFFFFF4 65
cpnew+=(strlen(cpnew)-2);
That must be put at the end of the script.