一个简单的object c程序

#import <Foundation/Foundation.h>
 @interface Student:NSObject{
    NSString* name;
    int age;
 }
  -(void)setName:(NSString*)_name;
    -(void)setAge:(NSString*)_age;
 -(void)say;
 @end
 @implementation Student
  -(void)setName:(NSString*)_name{
 name=_name;
 }
   -(void)setAge:(NSString*)_age{
 age=_age;
 }
  -(void)say{
    NSLog(@"i am %@,i %d years old.",name,age);
  }
 @end
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Student *s=[[Student alloc]init];
        [s setName:@"zhansan"];
        [s setAge:18];
        [s say];
    }
     return 0;
}

输出:

2022-11-21 06:24:48.464 a.out[3:3] i am zhansan,i 18 years old.