object c 学生信息管理系统

//  main.m

//  StuMIS

#import <Foundation/Foundation.h>

#import "Student.h"

#import "StuMIS.h"

int main(int argc, const char * argv[])

{

    @autoreleasepool {

     printf("欢迎进入学生信息管理系统\n");

     printf("pk国际2013，@copyright2013-2014\n\n");

        char c;

        StuMIS * sm=[[StuMIS alloc]init];

        while (YES) {

            printf("\n1 添加学生");

            printf("\n2 打印所有学生");

            printf("\n3 删除学生");

            printf("\n4 查找学生");

            printf("\n5 修改学生");

            printf("\n6 保存学生");

            printf("\n7 读取学生");

            printf("\n8 退出");

            scanf(" %c",&c);

            switch (c) {

                case '1':

                {Student * tmp=[[Student alloc]init];

                [tmp inputStudent];

                [sm addNewStu:tmp];

                }

                    break;

                case '2':

                    [sm printAllstu];

                    break;

                case '3':

                { int num;

                  printf("\n请输入学号");

                  scanf(" %d",&num);

                  [sm deleteStu:num];

                }

                    break;

                case '4':

                {int num;

                    printf("\n请输入学号");

                    scanf(" %d",&num);

                    Student * tmp;

                    tmp=[sm findStu:num];

                    [tmp printInfo];

                }

                    break;

                case '5':

                {   int num;

                    printf("\n请输入学号");

                    scanf(" %d",&num);

                    Student * tmp;

                    tmp=[sm findStu:num];

                    [tmp inputStudent];

                }

                    break;

                case '6':

                    [sm saveStu];

                    break;

                case '7':

                    [sm readStu];

                    break;

                case '8':

                    return 0;

                    break;

                default:

                    break;

            }

       

        }

   

    }

    return 0;

}

//

//  Student.h

//  StuMIS

#import <Foundation/Foundation.h>

@interface Student : NSObject<NSCoding>

{   NSString * name;

    int number;

    int age;

    int score;

}

@property NSString * name;

@property int number;

@property int age;

@property int score;

-(void)inputStudent;

-(void)printInfo;

-(void)modify:(Student *) stu;

@end

//  Student.m

#import "Student.h"

@implementation Student

@synthesize name;

@synthesize number;

@synthesize age;

@synthesize score;

//输入学生信息

-(void)inputStudent{

    printf("\n请输入学号 姓名 年龄 成绩\n");

    char nam[20];

    scanf("%d %s %d %d",&number,nam,&age,&score);

    name=[NSString stringWithFormat:@"%s",nam];

}

//打印学生信息

-(void)printInfo{

    printf("\n学号%d 姓名%s 年龄%d 成绩%d",number,[name UTF8String],age,score);

   

}

//修改信息

-(void)modify:(Student *) stu{

    self.name=stu.name;

    self.age=stu.age;

    self.score=stu.score;

}

-(void)encodeWithCoder:(NSCoder *)aCoder

{   [aCoder encodeInt:number forKey:@"number"];

    [aCoder encodeInt:age forKey:@"age"];

    [aCoder encodeObject:name forKey:@"name"];

    [aCoder encodeInt:score forKey:@"score"];

}

-(id)initWithCoder:(NSCoder *)aDecoder

{

    if (self=[super init]) {

        self.number=[aDecoder decodeIntForKey:@"number"];

        self.age=[aDecoder decodeIntForKey:@"age"];

        self.name=[aDecoder decodeObjectForKey:@"name"];

        self.score=[aDecoder decodeIntForKey:@"score"];

        } 

        return self;

}

@end

//

//  StuMIS.h

//  StuMIS

#import <Foundation/Foundation.h>

#import "Student.h"

@interface StuMIS : NSObject

{

    NSMutableArray * allStu;//保存所有学生

}

-(id)init;

-(void)addNewStu:(Student *)stu;

-(void)printAllstu;

-(Student *)findStu:(int)num;

-(void)deleteStu:(int)num;

-(void)saveStu;

-(void)readStu;

@end

//

//  StuMIS.m

#import "StuMIS.h"

@implementation StuMIS

//初始化

-(id)init{

 if(self=[super init])

 {

 allStu=[[NSMutableArray alloc]init];

 }else

 {

 return nil;

 }

    return self;

}

//添加学生信息

-(void)addNewStu:(Student *)stu{

    [allStu addObject:stu];

}

//打印所有学生信息

-(void)printAllstu{

    for(int i=0;i<[allStu count];i++)

    { Student * nows=[allStu objectAtIndex:i];

        [nows printInfo];

    }

}

//按学号查找学生信息

-(Student *)findStu:(int)num{

    for(int i=0;i<[allStu count];i++)

        { Student * nows=[allStu objectAtIndex:i];

            if(nows.number==num){

                return nows;

            }

        }

    return nil;

}

//删除学生信息

-(void)deleteStu:(int)num{

    for(int i=0;i<[allStu count];i++)

        { Student * nows=[allStu objectAtIndex:i];

            if(nows.number==num){

                [allStu removeObjectAtIndex:i];

                return;

            }

        }

}

//保存学生信息

-(void)saveStu{

    NSData *data1=[[NSData alloc]init];

    data1=[NSKeyedArchiver archivedDataWithRootObject:allStu];

    [data1 writeToFile:@"//Users//huangzhidong//Desktop//stud.txt" atomically:YES];

    NSLog(@"保存成功");

}

//读取学生信息

-(void)readStu{

    [allStu removeAllObjects];

     NSData *data2=[NSData dataWithContentsOfFile:@"//Users//huangzhidong//Desktop//stud.txt"];

NSArray *a=[NSKeyedUnarchiver unarchiveObjectWithData:data2];

    [allStu addObjectsFromArray:a];

   

        NSLog(@"读取成功");

}

@end