Question

Can anybody please explain the following line about the designated initializers:

The initializer list can omit elements that are declared anywhere in the aggregate, rather than only at the end.

Answer 1

Try this link.

The idea is to be able to refer to members of a complex type like structure during initialization. E.g.

struct s {    int a, b; };  int main() {   struct s = { .b = 42, .a = -42 };   return 0; } 

The flexibility is gained from being order independent when specifying values. Remember this was added to the C99 standard and may not be supported by compilers which do not support C99 fully (or support an earlier version of the standard).