day03 作业

车和汽车

1.设计2个类，类之间的关系自拟（比如继承、组合）

1> 车

(1)属性

轮子数

速度

(2)方法

属性相应的set和get方法

2> 客车

(1)属性

轮子数

速度

座位数

(2)方法

属性相应的set和get方法

/—————————————-/

car.h

#ifndef car_h
#define car_h

#import <Foundation/Foundation.h>

@interface Car: NSObject
{
@private
int _wheels;
int _speed;
}

- (void)setWheels:(int) wheels;

- (int)getWheels;

- (void)setSpeed:(int) speed;

- (int)getSpeed;
@end
#endif /* car_h */

car.m

#import <Foundation/Foundation.h>

#import "car.h"
@implementation Car

- (void)setWheels:(int) wheels
{
_wheels = wheels;
}

-(int)getWheels
{
return _wheels;
}

- (void)setSpeed:(int) speed
{
_speed = speed;
}

- (int)getSpeed
{
return _speed;
}
@end

bus.h

#ifndef bus_h
#define bus_h

#import "car.h"

#import <Foundation/Foundation.h>

@interface Bus:Car
{
@private
int _seats;
}

- (void)setSeats:(int) seats;

- (int)getSeats;

@end
#endif
/* bus_h */

bus.m

#import "bus.h"
#import "car.h"

@implementation Bus

- (void) setSeats:(int) seats
{
_seats = seats;
}

- (int)getSeats
{
return _seats;
}

@end

main.m

#import <Foundation/Foundation.h>
#import "car.h"
#import "bus.h"

int main(int argc, const char * argv[]) {
@autoreleasepool {
// insert code here...
Car *bus = [Bus new];
[bus setWheels:4];
[bus setSpeed:10];
NSLog(@"bus 轮子数:%d,速度:%d",[bus getWheels],[bus getSpeed]);
}
return 0;
}