实现班级信息程序

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1、实现班级信息程序1>定义3个类：OurClass、Teacher^Student□2、Teacher类，属性：姓名、年龄、班级，方法：考试(exam:)。3、Student类，属性：姓名、年龄、学号、成绩，方法：比较年龄。4、OurClass类，属性：老师、学生，方法：添加学生和移除学生。提示：1、Person类作为Student>Teacher类的父类，公共属性和方法写在Person类中。2、Student的成绩为NSMutableDictionary类型，存储课程名称和成绩。3、Teacher的考试内部实现随机为班级每个学生的某一科赋值。4、OurClass的学生为NSMut

2、ableArray类型，内部存Student的对象。@classTeacher,Student;@interfaceOurClass:NSObject@property(nonatomic5retain)Teacher*tea;@property(nonatomic,retain)NSMutableArray*stuAry;-(void)addStu:(Student*)stu;-(void)removeStu:(Student*)stu;@end#importnOurClass.hn#import“Student.h”©implementationOurClass-(insta

3、ncetype)init{self=[superinit];if(self){self.stuAry=[NSMutableArrayarrayWithCapacity:O];}returnself;}-(void)addStu:(Student*)stu{[self.stuAryaddObject:stu];}-(void)removeStu:(Student*)stu{[self.stuAryremoveObject:stu];}-(NSString*)description{return[NSStringstringWithFormat:@n%@-%@n5_tea3_stuA

4、ry];}@end@interfacePerson:NSObject@property(nonatomic5copy)NSString*name;@property(nonatomic5assign)NSIntegerage;-(id)initWithName:(NSString*)nameage:(NSInteger)age;//+(id)personWithName:(NSString*)nameage:(NSInteger)age;@end#importTerson.hn©implementationPerson-(id)initWithName:(NSString*)na

5、meage:(NSInteger)age{self=[superinit];if(self){self.age=age;self.name=name;}returnself;}//+(id)personWithName:(NSString*)nameage:(NSInteger)age{////[[personalloc]initWithName:nameage:age]//}@end#importnPerson.hM@interfaceStudent:Person@property(nonatomic3assign)NSIntegernum;@property(nonatomi

6、c5retain)NSMutableDictionary*score;・(BOOL)compareByAgeWithStu:(Student*)stu;-(id)initWithName:(NSString*)nameage:(NSInteger)agenum:(NSInteger)num;@end©implementationStudent-(id)initWithName:(NSString*)nameage:(NSInteger)agenum:(NSInteger)num{self=[superinitWithName:nameage:age];if(self){self.

7、num=num;self.score=[NSMutableDictionarydictionaryWithCapacity:O];}returnself;}-(BOOL)compareByAgeWithStu:(Student*)stu{if(self.age>stu.age){returnYES;}else{returnNO;}}-(NSString*)description{return[NSStringstringWithFormat:@H%@-%ld-%ld-%@H5se