how to declare an unsigned int in a C program

Question

On this link I came across http://lxr.linux.no/#linux+v2.6.36/include/linux/pci.h#L299 integer declaration unsigned int is_added:1;I have made C programs and declared integers in them but in the above I see use of : What sort of syntax is that?

Answer 1

I think you have come across a bit-field :)

Answer 2

It's part of a struct, which means that it indicates that the field should only use a certain number of bits instead of an entire byte or more.