OC开发之——第二个OC类(7)

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#include <Foundation/Foundation.h>
@interface Person:NSObject
{
    @public
    int age;
    double weight;
}
-(void)walk;
-(void)eat;
@end
@implementation Person

-(void)walk
{
    NSLog(@"%d岁，%f公斤的人走了一段路",age,weight);
}
-(void)eat
{
      NSLog(@"%d岁，%f公斤的人在吃东西",age,weight);
}
@end

int main()
{
    Person *p=[Person new];
    p->age=20;
    p->weight=50.0;
    [p walk];
    [p eat];
    
    Person *p1=[Person new];
    p1->age=30;
    p1->weight=60.0;
    [p1 walk];
    return 0;
}

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2020-03-30 20:30:31.800 a.out[1638:25451] 20岁，50.000000公斤的人走了一段路
2020-03-30 20:30:31.800 a.out[1638:25451] 20岁，50.000000公斤的人在吃东西
2020-03-30 20:30:31.800 a.out[1638:25451] 30岁，60.000000公斤的人走了一段路

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Person *p=[Person new];
p->age=20;
p->weight=50.0;
[p walk];

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Person *p=[Person new];
 p->age=20;
 p->weight=40;
 
 Person *p2=p;
 p2->age=30;
 [p walk];

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Person *p= [Person new];
p->age=20;
p->weight2=40;

Person *p2=[Person new];
p2->age=30;
p2->weight=50;
p=p2;
p->age=40;
[p2 walk];

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Person *p=[Person new];
p->age=20;
p->weight=40;
[p eat];
[p walk];
   
  Person *p2=[Person new];
  p->age=30;
  p->weight=60;
  [p2 eat];
  [p2 walk];