struct Data Structure

[thejosheb]

struct foo{
  unsigned bar0:1;
  unsigned bar1:1;
  unsigned bar2:1;
  unsigned bar3:2;
};

When a struct data type is defined and there are ":" placed behind the members, is that there to allocate that one bit of the unsigned space in memory is the foo->bar1 and then 2 bits are used for foo->bar3.

[LB]

They are called bit fields:
http://en.cppreference.com/w/cpp/language/bit_field

[thejosheb]

Thank you