day05-05-课程类设计

Objective-c

//  main.m
//  day05-05-课程类设计
//
//  Created by Aaron on 15/7/7.
//  Copyright (c) 2015年 Aaron. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Student.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Student *std = [[Student alloc] initWithName:@"蜡笔小新" withAge:3];
        Course *course1 = [[Course alloc] init];
        [course1 setCourseName:@"IOS"];
        [course1 setTeacherName:@"小白"];
        [course1 setCourseTime:10];
        Course *course2 = [[Course alloc] init];
        [course2 setCourseName:@"Android"];
        [course2 setTeacherName:@"小黑"];
        [course2 setCourseTime:20];
        Course *course3 = [[Course alloc] init];
        [course3 setCourseName:@"winCE"];
        [course3 setTeacherName:@"小红"];
        [course3 setCourseTime:19];
        [std addCourse:course1];
        [std addCourse:course2];
        [std addCourse:course3];
        //[std showInfo];
        Course *c = [std getCourseByIndex:10];
        NSLog(@"%@",c);
        NSLog(@"%@",[std allTeacherName]);
    }
    return 0;
}

#import <Foundation/Foundation.h>
#import "Course.h"
/*
 创建一个学生类,包含属性
    姓名name,年龄age,三门课程course1,course2,course3
 实现功能:
 初始化姓名和年龄
 设置某一门课程
 获取某一门课的对象
 获得学生所有任课老师的名字
 获得学生选课的所有课时
 获得学生选的所有课的课名
 打印学生的基本信息和课程信息
 */
@interface Student : NSObject
{
    NSString *_name;
    NSInteger _age;
    NSMutableArray *_courseArray;
}
-(instancetype)initWithName:(NSString *)name withAge:(NSInteger)age;
-(void)addCourse:(Course *)course;
-(Course *)getCourseByIndex:(NSInteger)index;
-(NSString *)allTeacherName;
-(NSInteger)allTime;
-(NSString *)allCourseName;
-(void)showInfo;
@end

import "Student.h"
@implementation Student
-(instancetype)initWithName:(NSString *)name withAge:(NSInteger)age
{
    if(self = [super init])
    {
        _name = name;
        _age = age;
    }
    return self;
}
-(void)addCourse:(Course *)course
{
    if(!_courseArray)
    {
        _courseArray = [NSMutableArray array];
    }
    if([_courseArray count] < 3)
    {
        [_courseArray addObject:course];
    }
}
-(Course *)getCourseByIndex:(NSInteger)index
{
    if(index>=0 && index<3)
    {
        return _courseArray[index];
    }
    return nil;
}
-(NSString *)allTeacherName
{
    //return [self getStringByNum:0];
    return [self getStringBySelector:@selector(teacherName) andFormat:@"老师%d:%@ "];
}
-(NSString *)getStringBySelector:(SEL)sel andFormat:(NSString *)format
{
    NSMutableString *str = [NSMutableString string];
    for(int i = 0; i < [_courseArray count]; i++)
    {
        Course *obj  = _courseArray[i];
        //[str appendFormat:format,i+1,
         //[obj performSelector:sel]];
        [str appendFormat:format,i+1,
         [obj performSelector:sel]];
    }
    return str;
}
#if 0
-(NSString *)getStringByNum:(int)num
{
    NSMutableString *str = [NSMutableString string];
    for(int i = 0; i < [_courseArray count]; i++)
    {
        Course *obj  = _courseArray[i];
        if(num == 0)
        {
            [str appendFormat:@"老师%d:%@ ",i+1,
             [obj teacherName]];
        }
        else
        {
            [str appendFormat:@"课程%d:%@ ",i+1,
             [obj courseName]];
        }
    }
    return str;
}
#endif
-(void)showInfo
{
    NSLog(@"%@",_courseArray);
}
@end

#import <Foundation/Foundation.h>
@interface Course : NSObject
{
    NSString *_courseName;
    NSString *_teacherName;
    NSInteger _courseTime;
}
-(void)setCourseName:(NSString *)name;
-(void)setTeacherName:(NSString *)name;
-(void)setCourseTime:(NSInteger)time;
-(NSString *)courseName;
-(NSString *)teacherName;
-(NSInteger)courseTime;
@end

#import "Course.h"
@implementation Course
-(void)setCourseName:(NSString *)name
{
    if(_courseName != name)
    {
        _courseName = name;
    }
}
-(void)setTeacherName:(NSString *)name
{
    if(_teacherName != name)
    {
        _teacherName = name;
    }
}
-(void)setCourseTime:(NSInteger)time
{
    if(_courseTime != time)
    {
        _courseTime = time;
    }
}
-(NSString *)courseName
{
    return _courseName;
}
-(NSString *)teacherName
{
    return _teacherName;
}
-(NSInteger)courseTime
{
    return _courseTime;
}
-(NSString *)description
{
    return _courseName;
}
@end