What is meaning of ":" in struct C
c, struct
Solution
That is a bit field.
It basically tells the compiler that `hey, this variable only needs to be x bits wide, so pack the rest of the fields in accordingly, OK`?
Problem
Possible Duplicate: What does 'unsigned temp:3' means ``` struct Test { unsigned a : 5; unsigned b : 2; unsigned c : 1; unsigned d : 5; }; Test B; printf("%u %u %u %u", B.a, B.b, B.c, B.d); // output: 0 0 0 0 static struct Test A = { 1, 2, 3, 4}; ``` Could someone explain me what is purpose of `:` in struct, `printf` just outputs `0` so I assume these are not default values, but what they are then? Also could someone explain me why does `A.a, A.b, A.c, A.d` outputs `1, 2, 1, 4` instead of `1, 2, 3, 4`