<p>Suppose I have one long long int and want to take its bits and construct four unsigned short ints out of it.</p>

<p>Particular order doesn't matter much here.</p>

<p>I generally know that I need to shift bits and truncate to the size of unsigned short int.  But I think I may make some weird mistake somewhere, so I ask.</p>

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

union ui64 {
    uint64_t one;
    uint16_t four[4];
};

int
main()
{
    union ui64 number = {0x123456789abcdef0};
    printf("%x %x %x %x\n", number.four[0], number.four[1],
                            number.four[2], number.four[3]);
    return 0;
}
```
```