How can I separate an Hexadecimal?

Question

Hello everyone, I'm new to this app and I hope you can help me with this code I did.
I want to split the hex variable into 2 variables, example, the ASCII value for letter 'A' is 0x41. And I need to split this value like 0x04 (4 most significant bits) and 0x01 (4 least significant).

#include <iostream>
#include <string.h>
using namespace std;

int main()
{
char *str = "String example";
int cntr =strlen (str);
char hex;

for (int i=0; i<cntr; i++)
{
hex = str [i];
}
}

Answer 1

I hope I understood the question and this is all you asked for.

https://code.sololearn.com/cvjGoMHorEyF/?ref=app

This won't work for extended ASCII, because of the arithmetic shift, but ASCII values under 128 are ok.

Edit: Ace noted that I could have used unsigned char and the above limitation would not be in effect, so I changed the code according to that.

Answer 2

thanks bro!! it made my final code work!!

Answer 3

Out of words sorry, I want to split the hex value, since I'm using a PIC18F4550 to control a LCD, instead of sending hex values (as I was doing), just want to type a string and it would translate the ASCII value to actually display to the LCD the string, and want to simplify my code, but I'm using 4 bit mode, so I gotta send the most significant 4 bits first, then least 4 significant bits. Thank you for your help.