Question

I have a cstring object str = “5043”, now i want to convert to Hex and put it in UCHAR array like

UCHAR sample[2];
Sample[0] = 0X50 
Sample[1] = 0X43

How can i do this? please advice me

Answer 1

You can scan the hex values directly from the string using sscanf(), something like below:

UCHAR sample[2];
for ( int i = 0; i < str.length() / 2 ; i++) {
    sscanf( (str.substr(i*2,2)).c_str(), "%hx", &sample[i]);
}

h is for short and x is for hexadecimal obviously.

Also, this assumes that the UCHAR array is declared to be half as large as the string size.