C + + Anonymous union,struct--Anonymous consortium and body

C + + Anonymous union,struct--Anonymous consortium and body

The basic usage of the structure and the consortium is not to be mentioned, but only for the information they visit when they are anonymous. If the token is different, you can access it directly across tiers. Example

2. #include <iostream>
   
4. using namespace Std;
   
8. struct Zoo_obj{
   
10. string name;
    
12. Union {
    
14. unsigned int property;
    
16. struct{ //plant
    
18. unsigned int
    
20. Hasleaf: 1,
    
22. Hasflower: 1,
    
24. Hastrunk: 1,
    
26. Hasrattan: 1;
    
28. };
    
30. struct { //animal
    
32. unsigned int
    
34. Isbackbone: 1,
    
36. Isovipara: 1,
    
38. Haslags: 1,
    
40. Haswing: 1;
    
42. };
    
44. };
    
48. };
    
52. int main(void)
    
54. {
    
56. Zoo_obj Peony = {"peony", 0};
    
58. Zoo_obj Dog = {name:"Dog", 0};
    
60. Dog. Haslags = true;
    
62. /* zoo_obj Dog = {name:"Dog",property: 0};
    
64. * Sorry, unimplemented: Non-trivial designated initializers
    
66. * NOT supported
    
68. */
    
72. cout << peony. Name << "Hasleaf" << peony. Hasleaf < < Endl;
    
74. cout << dog. Name << "Haslags" << dogHaslags << Endl;
    
78. }

Output

1. Peony Hasleaf 0
2. Dog Haslags 1

Specified access like sake name is not supported. If an error is specified

1. Sorry, unimplemented:non-trivial designated initializers not supported

C + + anonymous union,struct-Anonymous consortium and body