Main.m
#import <Foundation/Foundation.h>
#import "Car.h"
#import "Engine.h"
#import "Lamp.h"
/*
设计例如以下几个类，Car自己定义初始化方法，初始化方法传入引擎对象和车灯对象。
当车启动的时候，会调用引擎转动，车灯亮灯，当车停止的时候调用引擎停止转动，车灯熄灭。
*/
int main(int argc, const char * argv[])
{
//创建引擎对象
Engine *engine = [[Engine alloc] initWithModel:@"1234567" withCapacity:3.14];
//创建车灯对象
Lamp *lamp = [[Lamp alloc] initWithWattage:60.0];
//创建car对象
Car *car = [[Car alloc] initWithEngine:engine withLamp:lamp];
[car setName:@"兰博基尼" withLicence:@"8888888"];
int s;
while (1) {
NSLog(@"请输入指令（1:启动 2:停止）：");
scanf("%d",&s);
if (s == 1) {
[car run];
}else if (s == 2) {
[car stop];
}else {
NSLog(@"输入非法");
}
}
return 0;
}
Car.h
#import <Foundation/Foundation.h>
#import "Engine.h"
#import "Lamp.h"
@interface Car : NSObject {
NSString *_name; //车名
NSString *_licence; //车牌号
Engine *_engine; //引擎
Lamp *_lamp; //车灯
}
//自己定义初始化方法
- (id)initWithEngine:(Engine *)engine withLamp:(Lamp *)lamp;
- (void)setName:(NSString *)name withLicence:(NSString *)licence;
//车启动
- (void)run;
//车停止
- (void)stop;
Car.m
#import "Car.h"
@implementation Car
//自己定义初始化方法
- (id)initWithEngine:(Engine *)engine withLamp:(Lamp *)lamp {
self = [super init];
if (self != nil) {
_engine = engine;
_lamp = lamp;
}
return self;
}
- (void)setName:(NSString *)name withLicence:(NSString *)licence {
_name = name;
_licence = licence;
}
//车启动
- (void)run {
NSLog(@"车牌号为：%@的%@车启动了",_licence,_name);
[_engine turn];
[_lamp light];
}
//车停止
- (void)stop {
NSLog(@"车牌号为：%@的%@车停止了",_licence,_name);
[_engine stopTurn];
[_lamp dark];
}
Engine.h
#import <Foundation/Foundation.h>
@interface Engine : NSObject{
NSString *_model; //型号
float _capacity; //排量
}
//自己定义初始化方法
- (id)initWithModel:(NSString *)model withCapacity:(float)capacity;
//转动
- (void)turn;
//停止转动
- (void)stopTurn;Engine.m
//自己定义初始化方法
- (id)initWithModel:(NSString *)model withCapacity:(float)capacity {
self = [super init];
if (self != nil) {
_model = model;
_capacity = capacity;
}
return self;
}
//转动
- (void)turn {
NSLog(@"型号为：%@ 排量为：%.2f的引擎转动了",_model,_capacity);
}
//停止转动
- (void)stopTurn {
NSLog(@"型号为：%@ 排量为：%.2f的引擎停止转动了",_model,_capacity);
}
Lamp.h
@interface Lamp : NSObject {
float _wattage; //瓦特
}
//自己定义初始化的方法
- (id)initWithWattage:(float)wattage;
//灯亮
- (void)light;
//熄灯
- (void)dark;Lamp.m
//自己定义初始化的方法
- (id)initWithWattage:(float)wattage {
self = [super init];
if (self != nil) {
_wattage = wattage;
}
return self;
}
//灯亮
- (void)light {
NSLog(@"瓦特数：%.2f的灯亮了",_wattage);
}
//熄灯
- (void)dark {
NSLog(@"瓦特数：%.2f的灯灭了",_wattage);
}