Question

I have the following string: s="80". I need to put this in an
unsigned char k[]. The unsigned char should look like this: unsigned char k[]={0x38,0x34}, where 0x38=8 and 0x34=0 These are the hexadecimal values for 8 and 0. How to do this? Need some help!

Please give some code. Thx

I am working on ubuntu c++ code. THX!

I use this for an encryption! I need 0x38 in an unsigned char.PLEASE HELP! Need some code:)

EDIT:

HOW TO OBTAIN THE DEC/CHAR VALUE AND PUT IT IN AN unsigned char k[]?
I’ve realised that it’s ok if in the unsigned char [] i have the dec values {56,52} of the 8 and 0 that i have in the string!

Answer 1

Assuming you want this string converted as ASCII (or UTF-8) it is already in the correct format.

std::string  s="80";

std::cout << "0x" << std::hex << static_cast<int>(s[0]) << "\n";
std::cout << "0x" << std::hex << static_cast<int>(s[1]) << "\n";

If you want it in an int array, then just copy it:

int   data[2];
std::copy(s.begin(), s.end(), data);