Discussion
If the declaration unsigned c:5; is replaced by unsigned : 6; then
Answer: C
Correct answer: compiler will give a new name for the field
A bit-field declared without a name - unsigned : 6; - is an unnamed bit-field, which is legal C. It reserves the stated number of bits as padding but provides no name by which they can be accessed.
Its purpose is layout control: unnamed fields are used to align the following members at a particular bit position when a structure is mapped onto a hardware register or a defined external format. A width of zero has a further special meaning, forcing the next field to begin at the next storage unit.
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