How to do hex8 encoding in c?

Posted by Tech163 on Stack Overflow See other posts from Stack Overflow or by Tech163
Published on 2010-05-28T21:21:08Z Indexed on 2010/05/28 21:32 UTC
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I am trying to encode a string in hex8 using c. The script I have right now is:

int hex8 (char str) {
 str = printf("%x", str);
 if(strlen(str) == 1) {
  return printf("%s", "0", str);
 } else {
  return str;
 }
}

In this function, I will need to add a 0 ahead of the string if the length is less than 1. I don't know why I'm getting:

passing argument 1 of 'strlen' makes pointer from integer without a cast

Does anyone know why?

Developer IT