#include <stdio.h>
#include <inttypes.h>

int main()
{
    unsigned int n=0xaabbccdd;
    unsigned char a,b,c,d;
    d = n;
    c = n>>8;
    b = n>>16;
    a = n>>24;
    printf("a = %x, b = %x, c = %x, d = %x", a,b,c,d);
    // a = aa, b = bb, c = cc, d = dd
}