Function in struct

The C language is really flexible. Today, I found the application of functions in the structure, and I checked some information to summarize it.

In fact, the struct is similar to the class functions in C ++, but it is process oriented and has no scope requirements, such as public.

You can define a function in the struct, and then call it like a class call method. You can also define a function pointer and assign a value to it during the call (the pointer you want to call ), in this case, C can also get a temporary string of object-oriented information. Haha. You can try it.

1 # include <stdio. h>
2 struct Square
3 {
4 int length;
5 Int width;
6 int height;
7 int (* Add) (int A, int B );
8 };
9 int square_add (int A, int B)
10 {
11 return A + B;
12}
13 int bulk (INT length, int width, int height)
14 {
15 struct square squ =
16 {
17. Length = length,
18. width = width,
19. Height = height,
20 Add: square_add,
21 };
22
23 printf ("add () is % d/N", sqlu. Add (100,200 ));
24 printf ("length is % d/N", SQU. Length );
25 printf ("width is % d/N", SQU. width );
26 printf ("height is % d/N", SQU. Height );
27 return squ. length * squ. Width * squ. height;
28}
29 int main ()
30 {
31 printf ("the square is % d/N", bulk (100,200,300 ));
32 return 0;
33}