Hello,
How can I initialize a structure if one field in the structure is itself a structure?
Thank you.
A:
struct A
{
int n;
}
struct B
{
A a;
} b;
You can initialize n by the following statement. Is this what you are looking for.
b.a.n = 10;
ckv
2010-07-05 05:32:58
In the terms used to define the language, that is an example of *assignment* rather than *initialisation*. In this context an initialiser is used only at declaration of an object.
Clifford
2010-07-05 09:06:09
+10
A:
You need to use more braces (actually, they're optional, but GCC makes a warning these days). Here's an example:
struct s1 { int a; int b; };
struct s2 { int c; struct s1 s; };
struct s2 my_s2 = { 5, { 6, 3 } };
Carl Norum
2010-07-05 05:33:46
Optional in only where member `s` is fully initialised (i.e. all members), necessary if you want to only partially initialise the structure.
Clifford
2010-07-05 09:09:38
In C99 you may use the following notation which is easier to maintain and to read: `struct s2 my_s2 = { .c = 5, .s = { .a = 6, .b = 3 } };`
Jens Gustedt
2010-07-05 16:40:04