17. Extract the Nibble from an 8-bit Register

#include <stdio.h>
#include <stdint.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
    
    if(pos==1)
    {
    reg= reg&(0xF0)>>4;
    }
else
{
    reg=reg&(0x0F);
}
return reg;
}

int main() {
    unsigned char reg;
    int pos;
    scanf("%hhu %d", &reg, &pos);
    printf("%d", extractNibble(reg, pos));
    return 0;
}