what does this mean in c int a:16;? [duplicate]

Answer 1

 struct s
    {
     int a:1;
     int b:2;
     int c:7;
    };/*size of structure s is 4 bytes and not 4*3=12 bytes since all share the same space provided by int declaration for the first variable.*/
 struct s1
    {
     char a:1;
     };/*size of struct s1 is 1byte had it been having any more char _var:_val it would have    been the same.*/