#import<Foundation/Foundation.h>
//创建一个人账户类.有一个属性-余额
@interface Account:NSObject{
    int _yuE;//不允许获取这个余额
}
-(void)setYuE:(int) yuE;
+(void)printBank;
-(void)quQian:(int)money;//需要有一个取钱的方法.
-(void)printYuE;//定义一个方法打印这个账户信息打印余额
@end
@implementation Account
-(void)setYuE:(int) yuE{
    if(_yuE<=0){
        NSLog(@"好贼,给我负的?!");
    }else{
        _yuE+=yuE;//累加
    }

}
+(void)printBank{
    NSLog(@"欢迎光临中国银行");
}
-(void)quQian:(int)money{
    NSLog(@"请输入你要取的钱");
    if(money<=0){
        NSLog(@"滚");
   
    }else if(money>_yuE){
    NSLog(@"滚开");
    }else{
        NSLog(@"请收好您的钱:%d",money);
        _yuE-=money;
    }
}
-(void)printYuE{
    NSLog(@"当前余额为%d",_yuE);
}
@end
//定义一个银行类.里面有两个个人账户.
@interface Bank:NSObject{
    Account* _a1;
    Account* _a2;
}
-(void)setA1:(Account*) a1;
-(Account*)getA1;

-(void)setA2:(Account*) a2;
-(Account*)getA2;
-(void)printAllAccount;
@end
@implementation Bank
-(void)setA1:(Account*) a1{
    _a1 = a1;
}

-(Account*)getA1{
    return _a1;
}

-(void)setA2:(Account*) a2{
    _a2 = a2;
}

-(Account*)getA2{
    return _a2;
}
-(void)printAllAccount{
    [_a1 printYuE];
    [_a2 printYuE];

}
@end

int main(){
    //请打印这个银行类中所有账户的信息
    Bank* bank = [Bank new];
    Account* ds = [Account new];
    [ds setYuE:100];
   
    Account* th = [Account new];
    [th setYuE:1000000];
   
    [bank setA1:ds];
    [bank setA2:th];
   
    [bank printAllAccount];
   
    [[bank getA1]quQian:100];
    [[bank getA2]quQian:1000];
   
    [bank printAllAccount];
   

    return 0;
}
哪位大神有空帮忙看看

#import<Foundation/Foundation.h>
//创建一个人账户类.有一个属性-余额
@interface Account:NSObject{
    int _yuE;//不允许获取这个余额
}
-(void)setYuE:(int) yuE;
+(void)printBank;
-(void)quQian:(int)money;//需要有一个取钱的方法.
-(void)printYuE;//定义一个方法打印这个账户信息打印余额
@end
@implementation Account
-(void)setYuE:(int) yuE{
    if(_yuE<=0){
        NSLog(@"好贼,给我负的?!");
    }else{
        _yuE+=yuE;//累加
    }

}
+(void)printBank{
    NSLog(@"欢迎光临中国银行");
}
-(void)quQian:(int)money{
    NSLog(@"请输入你要取的钱");
    if(money<=0){
        NSLog(@"滚");
   
    }else if(money>_yuE){
    NSLog(@"滚开");
    }else{
        NSLog(@"请收好您的钱:%d",money);
        _yuE-=money;
    }
}
-(void)printYuE{
    NSLog(@"当前余额为%d",_yuE);
}
@end
//定义一个银行类.里面有两个个人账户.
@interface Bank:NSObject{
    Account* _a1;
    Account* _a2;
}
-(void)setA1:(Account*) a1;
-(Account*)getA1;

-(void)setA2:(Account*) a2;
-(Account*)getA2;
-(void)printAllAccount;
@end
@implementation Bank
-(void)setA1:(Account*) a1{
    _a1 = a1;
}

-(Account*)getA1{
    return _a1;
}

-(void)setA2:(Account*) a2{
    _a2 = a2;
}

-(Account*)getA2{
    return _a2;
}
-(void)printAllAccount{
    [_a1 printYuE];
    [_a2 printYuE];

}
@end

int main(){
    //请打印这个银行类中所有账户的信息
    Bank* bank = [Bank new];
    Account* ds = [Account new];
    [ds setYuE:100];
   
    Account* th = [Account new];
    [th setYuE:1000000];
   
    [bank setA1:ds];
    [bank setA2:th];
   
    [bank printAllAccount];
   
    [[bank getA1]quQian:100];
    [[bank getA2]quQian:1000];
   
    [bank printAllAccount];
   

    return 0;
}
哪位大神有空帮忙看看