////  Dog.h//  OC12_自动释放池////  Created by zhangxueming on 15/6/18.//  Copyright (c) 2015年 zhangxueming. All rights reserved.//#import 
     
      @interface Dog : NSObject@end////  Dog.m//  OC12_自动释放池////  Created by zhangxueming on 15/6/18.//  Copyright (c) 2015年 zhangxueming. All rights reserved.//#import "Dog.h"@implementation Dog- (void)dealloc{    NSLog(@"dog is release");    [super dealloc];}@end
     

////  main.m//  OC12_自动释放池////  Created by zhangxueming on 15/6/18.//  Copyright (c) 2015年 zhangxueming. All rights reserved.//#import 
     
      #import "Dog.h"int main(int argc, const char * argv[]) {    NSMutableArray *releasePool=[[NSMutableArray alloc] init];        Dog *xiaoBai = [[Dog alloc] init];    [releasePool addObject:xiaoBai];    [xiaoBai release];    NSLog(@"xiaoBai = %li", xiaoBai.retainCount);        Dog *xiaoHei = [[Dog alloc] init];    [releasePool addObject:xiaoHei];    [xiaoHei release];        [releasePool release];        return 0;}