The use of Objective-c:nsset and Nsmutbaleset

2. 
   #import <Foundation/Foundation.h>
4. int main (int argc, const char * argv[])
6. {
10. @autoreleasepool {
14. Nsset *set1 = [Nsset setwithobjects:@ "a", @ "B", @ "C", @ "D", nil];
16. Nsset *set2 = [[Nsset alloc] initwithobjects:@ "1", @ "2", @ "3", nil];
18. Nsarray *array = [Nsarray arraywithobjects:@ "a", @ "B", @ "C", nil];
20. Nsset *set3 = [Nsset Setwitharray:array];
24. NSLog (@ "Set1:%@", Set1);
26. NSLog (@ "Set2:%@", Set2);
28. NSLog (@ "Set3:%@", Set3);
32. Get the number of collections
34. NSLog (@ "Set1 count:%d", set1.count);
38. Gets all the objects in the collection as an array
40. Nsarray *allobj = [Set2 allobjects];
42. NSLog (@ "AllObj:%@", allobj);
46. Get an arbitrary object
48. NSLog (@ "Anyobj:%@", [Set3 Anyobject]);
52. Whether to include an object
54. NSLog (@ "contains:%d", [Set3 containsobject:@ "Obj2"]);
60. Whether to include objects in the specified set
62. NSLog (@ "intersect obj:%d", [Set1 Intersectsset:set3]);
66. is exactly matched
68. NSLog (@ "IsEqual:%d", [Set2 Isequaltoset:set3]);
72. Whether it is a child collection
74. NSLog (@ "Issubset:%d", [Set3 Issubsetofset:set1]);
82. Nsset *set4 = [Nsset setwithobjects:@ "a", @ "B", nil];
84. Nsarray *ary = [Nsarray arraywithobjects:@ "1", @ "2", @ "3", @ "4", nil];
86. Nsset *set5 = [Set4 setbyaddingobjectsfromarray:ary];
88. NSLog (@ "Addfromarray:%@", SET5);
98. Nsmutableset *mutableset1 = [Nsmutableset setwithobjects:@ "1", @ "2", @ "3", nil];
100. Nsmutableset *mutableset2 = [Nsmutableset setwithobjects:@ "a", @ "2", @ "B", nil];
102. Nsmutableset *mutableset3 = [Nsmutableset setwithobjects:@ "1", @ "C", @ "B", nil];
106. Subtract from collection element
108. [MutableSet1 Minusset:mutableset2];
110. NSLog (@ "Minus:%@", MutableSet1);
114. Leaving only the equal elements
116. [MutableSet1 Intersectset:mutableset3];
118. NSLog (@ "intersect:%@", MutableSet1);
122. Merging collections
124. [MutableSet2 Unionset:mutableset3];
126. NSLog (@ "union:%@", MutableSet2);
130. Delete the specified element
132. [MutableSet2 removeobject:@ "a"];
134. NSLog (@ "Removeobj:%@", MutableSet2);
140. Delete all data
142. [MutableSet2 removeallobjects];
144. NSLog (@ "RemoveAll:%@", MutableSet2);
148. }
150. return 0;
152. }

The use of Objective-c:nsset and Nsmutbaleset