1. #import <Foundation/Foundation.h>
   
2. //定义狗类
   
3. @interface Dog : NSObject
   
4. {
   
5.     @public;
   
6.     NSString *_color;//颜色
   
7.     int _speed;//速度
   
8.     NSString *_sex;//性别
   
9.     float _weight;//体重
   
10. }
    
11. -(void)eat:(float *)weight;//吃饭
    
12. -(void)bark:(NSString *)color and:(int)speed and:(NSString *)sex and:(float) weight;//叫
    
13. -(void)run:(int)speed and:(float *)weight;//跑步
    
14. +(int)compareColor:(NSString *)dogColorOne and :(NSString *)dogColorTwo;//比较两个狗的颜色
    
15. +(int)compareSpeed:(int)dogSpeedOne and :(int)dogSpeedTwo;//比较两个狗的速度
    
16. @end
    
17. 
    
18. @implementation Dog
    
19. //狗每吃一次体重就增加0.5kg,输出吃完后的体重
    
20. -(void)eat:(float *)weight{
    
21.     *weight += 0.5f;
    
22.     NSLog(@"吃完饭后体重为:%.1fkg",*weight);
    
23. }
    
24. //狗叫,输出所有狗的属性
    
25. -(void)bark:(NSString *)color and:(int)speed and:(NSString *)sex and:(float) weight{
    
26.     NSLog(@"狗的颜色是:%@,速度是:%dm/s,性别是:%@,体重是:%.1fkg",color,speed,sex,weight);
    
27. }
    
28. //狗每跑步一次体重就减少0.5kg,输出跑步速度及跑步后的体重
    
29. -(void)run:(int)speed and:(float *)weight{
    
30.     *weight -= 0.5f;
    
31.     NSLog(@"吃完饭后体重为:%.1fkg,速度为:%dm/s",*weight,speed);
    
32. }
    
33. //比较两个狗的颜色,颜色一样返回YES,不一样返回NO
    
34. +(int)compareColor:(NSString *)dogColorOne and :(NSString *)dogColorTwo{
    
35.     if (0 == (((int)dogColorOne) - ((int)dogColorTwo))) {
    
36.         NSLog(@"两个狗的颜色一样");
    
37.         return YES;
    
38.     }
    
39.         NSLog(@"两个狗的颜色不一样");
    
40.         return NO;
    
41. }
    
42. //比较两个狗的速度,返回速度差
    
43. +(int)compareSpeed:(int)dogSpeedOne and :(int)dogSpeedTwo{
    
44.     if (dogSpeedOne > dogSpeedTwo) {
    
45.         return dogSpeedOne-dogSpeedTwo;
    
46.     }
    
47.     return dogSpeedTwo-dogSpeedOne;
    
48. }
    
49. @end
    
50. 
    
51. int main(){
    
52.     @autoreleasepool {
    
53. //        创建两个狗对象
    
54.         Dog *dogOne = [Dog new];
    
55.         Dog *dogTwo = [Dog new];
    
56. //        分别给两个狗的属性赋值
    
57.         dogOne->_color = @"白色";
    
58.         dogTwo->_color = @"黑色";
    
59.         dogOne->_sex = @"公狗";
    
60.         dogTwo->_sex = @"母狗";
    
61.         dogOne->_speed = 20;
    
62.         dogTwo->_speed = 18;
    
63.         dogOne->_weight = 35.0f;
    
64.         dogTwo->_weight = 33.3f;
    
65. //        狗叫
    
66.         [dogOne bark:dogOne->_color and:dogOne->_speed and:dogOne->_sex and:dogOne->_weight];
    
67. //        狗吃一顿饭
    
68.         [dogOne eat:&(dogOne->_weight)];
    
69. //        狗跑步
    
70.         [dogOne run:dogOne->_speed and:&(dogOne->_weight)];
    
71. //        比较两个狗的颜色
    
72.         int a = [Dog compareColor:dogOne->_color and:dogTwo->_color];
    
73.         NSLog(@"%d",a);
    
74. //        比较两个狗的速度
    
75.         int difSpeed = [Dog compareSpeed:dogOne->_speed and:dogTwo->_speed];
    
76.         NSLog(@"两个狗的速度差为:%dm/s",difSpeed);
    
77.     }
    
78.     return 0;
    
79. }

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感觉好高大上啊!不会不会的

唯爱丶 发表于 2015-8-14 23:48
感觉好高大上啊!不会不会的

别着急,等学到那个地方了就能明白了,不过我这个写的不好,还需要改进