【Objective-C语言 面向对象版的士兵突击】

士兵突击，是用Objective-C语言实现的一个面向对象的案例。

士兵要射击，需要有枪。枪要开火，需要有弹夹。弹夹装子弹，需要判断子弹数量是否大于最大装弹量。
原则就是自己的事情自己做，判断装弹量是否大于0，并且小于最大装弹量，是弹夹的事儿。
判断弹夹里是否还有子弹，是枪在射击时的事儿，如果有子弹，则可以射击。
士兵射击，需要有把枪，士兵有了枪才能射击。

#import

/// 弹夹类
@interface DanJia : NSObject
{
///最大装弹数
int _maxCapacity;
///现有子弹数
int _bulletCount;
}

• (void)setMaxCapacity:(int)maxCapacity;

• (int)maxCapacity;

• (void)setBulletCount:(int)bulletCount;

• (int)bulletCount;
  @end

#import “DanJia.h”

@implementation DanJia

• (void)setMaxCapacity:(int)maxCapacity
  {
  _maxCapacity = maxCapacity;
  }

• (int)maxCapacity
  {
  return _maxCapacity;
  }

• (void)setBulletCount:(int)bulletCount
  {
  if(bulletCount>= 0 && bulletCount <= _maxCapacity)
  {
  _bulletCount = bulletCount;
  }
  else
  {
  _bulletCount = 10;
  }

}

• (int)bulletCount
  {
  return _bulletCount;
  }
  @end

#import
#import “DanJia.h”
///枪类
@interface Gun : NSObject
{
NSString *_model;
int _sheCheng;
DanJia *_danJia;
//int _bulletCount;
}

• (void)setModel:(NSString *)model;

• (NSString *)model;

• (void)setSheCheng:(int)sheCheng;

• (int)sheCheng;

• (void)setDanJia:(DanJia *)danJia;

• (DanJia *)danJia;

//- (void)setBulletCount:(int)bulletCount;
//- (int)bulletCount;

• (void)shoot;
  @end

#import “Gun.h”

@implementation Gun

• (void)setModel:(NSString *)model
  {
  _model = model;
  }

• (NSString *)model
  {
  return _model;
  }

• (void)setSheCheng:(int)sheCheng
  {
  _sheCheng = sheCheng;
  }

• (int)sheCheng
  {
  return _sheCheng;
  }

• (void)setDanJia:(DanJia *)danJia
  {
  _danJia = danJia;
  }

• (DanJia *)danJia
  {
  return _danJia;
  }

//- (void)setBulletCount:(int)bulletCount
//{
// _bulletCount = bulletCount;
//}
//- (int)bulletCount
//{
// return _bulletCount;
//}

• (void)shoot
  {
  //1.先判断当前枪对象的弹夹中是否还有子弹
  if([_danJia bulletCount] > 0)
  {
  NSLog(@“突突突…”);
  //突突突完以后，弹夹里的子弹数量要减少1;
  int count = [_danJia bulletCount];
  [_danJia setBulletCount:–count];
  NSLog(@“剩余子弹数量：%d”,count);
  }
  else
  {
  NSLog(@“子弹都没有，突突突毛线啊。。。”);
  }
  }
  @end

#import
#import “Gun.h”

@interface Soldier : NSObject
{
NSString *_name;
NSString *_type;
Gun *_gun;
}

• (void)setName:(NSString *)name;

• (NSString *)name;

• (void)setType:(NSString *)type;

• (NSString *)type;

• (void)setGun:(Gun *)gun;

• (Gun *)gun;

• (void)fire;
  @end

#import “Soldier.h”

@implementation Soldier

• (void)setName:(NSString *)name
  {
  _name = name;
  }

• (NSString *)name
  {
  return _name;
  }

• (void)setType:(NSString *)type
  {
  _type = type;
  }

• (NSString *)type
  {
  return _type;
  }

• (void)setGun:(Gun *)gun
  {
  _gun = gun;
  }

• (Gun *)gun
  {
  return _gun;
  }

• (void)fire
  {
  NSLog(@“预备，开火…”);
  [_gun shoot];
  }
  @end

#import
#import “Soldier.h”
int main()
{
DanJia *dj = [DanJia new];
[dj setMaxCapacity:100];
[dj setBulletCount:50];
Gun *ak47 = [Gun new];
[ak47 setModel:@“Ak47”];
[ak47 setDanJia:dj];
//[ak47 setBulletCount:100];

Soldier *xsd = [Soldier new];
[xsd setName:@"许三多"];
[xsd setType:@"炮兵"];
[xsd setGun:ak47];
for(int i = 0 ; i < 100 ; i++)
    [xsd fire];
return 0;

}

以上这7个文件，分别复制到相应的文件里，运行即可。