#include <stdio.h>

char al = 0xAA;
char ah = 0xF0;
int c;

void main(){
    c = ((al & ah) << 8) | (al ^ ah);

    al = (char)c;
    ah = (char)(c>>8);
    printf("%x\n", c); // a05a
    printf("%x\n", al); // 5a
    printf("%x\n", ah&0xff); // a0
    printf("%lx\n", sizeof(char)); // 1
}