Do you have a class information program that contains 4 defined classes: Ourclass, Teacher, Student, person, and implementation methods.

1. #import "Teacher.h"
2. @interface Ourclass:nsobject
3. @property (nonatomic, retain) Teacher *tea;
4. @property (nonatomic, retain) Nsmutablearray *arr;
5. @end </span>

2. #import "OurClass.h"
4. @implementation Ourclass
6. -(NSString *) description
8. {
10. return [NSString stringwithformat:@"%@", _arr];
12. }
14. -(void) Dealloc
16. {
18. NSLog (@"class space release");
20. [_tea release];
22. [_arr release];
24. [Super Dealloc];
26. }
28. @end
30. </span>

< param name= "wmode" value= "Transparent" >

1. @interface Person:nsobject
2. {
3. NSString *_name;
4. Nsinteger _age;
5. }
6. @property (nonatomic, retain) NSString *name;
7. @property (nonatomic) Nsinteger age;
8. @end </span>

< param name= "wmode" value= "Transparent" >

1. <span style="FONT-SIZE:18PX;" > @interface Teacher:person
2. -(NSNumber *) exam: (NSString *) course;
3. @end </span>

< param name= "wmode" value= "Transparent" >

1. <span style= "FONT-SIZE:18PX;" > @implementation  teacher  
2. -  (nsnumber *) exam: (nsstring *) course  
3. {&NBSP;&NBSP;
4.     nsnumber *score  = [nsnumber numberwithfloat:arc4random ()  % 101];  
5.     return score;  
6. }  
7. -  (void) dealloc  
8. {  
9.     nslog (@
10.     [_name release];  
11.      [super dealloc];  
12. }  
13. @end </span >  

1. <span style="FONT-SIZE:18PX;" > @interface Student:person
2. @property (nonatomic, retain) nsmutabledictionary *score;
3. Initialization
4. -(ID) Initwithname: (NSString *) Name: (Nsinteger) Age Score: (Nsmutabledictionary *) score;
5. Compare Age Size
6. -(Nscomparisonresult) Comparebyage: (Student *) anstudent;
7. @end </span>

2. @implementation Student
4. -(ID) Initwithname: (NSString *) Name: (Nsinteger) Age Score: (Nsmutabledictionary *) score
6. {
8. self = [super init];
10. if (self) {
12. Self.name = name;
14. Self.age = age;
16. Self.score = score;
18. }
20. return self;
22. }
24. -(Nscomparisonresult) Comparebyage: (Student *) anstudent
26. {
28. if ([self] > [anstudent]) {
30. return nsordereddescending;
32. }Else if ([self-age] = = [Anstudent age]) {
34. return nsorderedsame;
36. }Else {
38. return nsorderedascending;
40. }
42. }
44. -(NSString *) description
46. {
48. return [NSString stringwithformat:@"%@,%ld,%@", _name,_age,_score];
50. }
52. -(void) Dealloc
54. {
56. NSLog (@"*******");
58. [_name release];
60. [_score release];
62. [Super Dealloc];
64. }
66. @end
68. </span>

2. #import "Student.h"
4. #import "OurClass.h"
6. int main (int argc, const char * argv[])
8. {
12. @autoreleasepool {
14. Nsmutabledictionary *dic1 = [nsmutabledictionary dictionarywithobjectsandkeys:@87,@"Yuwen", nil];
16. Nsmutabledictionary *dic2 = [nsmutabledictionary dictionarywithobjectsandkeys:@94,@"Yuwen", nil];
18. Nsmutabledictionary *dic3 = [nsmutabledictionary dictionarywithobjectsandkeys:@76,@"Yuwen", nil];
20. Student *STU1 = [[Student alloc] initwithname:@"xiaoming" age:23 Score:dic1]; //0-1
22. Student *STU2 = [[Student alloc] initwithname:@"Xiaohong" age:35 Score:dic2]; //0-1
24. Student *STU3 = [[Student alloc] initwithname:@"Xiaofang" age:17 score:dic3]; //0-1
26. Nsmutablearray *stuarr = [[Nsmutablearray alloc] initwithobjects:stu1,stu2, nil]; //0-1
28. [STU1 release];
30. [STU2 release];
32. Ourclass *class = [[Ourclass alloc] init]; //0-1
34. Class.arr = Stuarr; //1-2
36. [Stuarr release]; //2-1
38. NSLog (@"%@",Class);
40. //change of teacher
42. Teacher *teacher = [[Teacher alloc] init]; //0-1
44. Class.tea = teacher; //1-2
46. [Teacher release]; //2-1
48. //Add student
50. [Class.arr ADDOBJECT:STU3];
52. NSLog (@"%@",Class);
54. [STU3 release];
56. //Remove Students
58. [Class.arr REMOVEOBJECT:STU3];
60. NSLog (@"%@",Class);
62. //Student Age comparison
64. Nscomparisonresult result = [STU1 COMPAREBYAGE:STU2];
66. NSLog (@"%ld", result);
68. //Set Student scores
70. NSNumber *num = [teacher exam:@"Yuwen"];
72. NSLog (@"score is%@", num);
74. [class release];
76. }
78. return 0;
80. }
82. </span>

Do the class information program, which contains 4? defined classes: Ourclass, Teacher, Student, person, and implementation methods.