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[C] 怎样宏定义一个1T大小的数 [复制链接]

add358

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1楼 [收藏(0)] [报告]
发表于 2013-04-18 18:30 |只看该作者 |倒序浏览
怎样宏定义一个1T大小（或者更大）的数？
tansijie

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2楼 [报告]
发表于 2013-04-18 18:41 |只看该作者
1T大小的数，你是说 位数么？
char  num[]="999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999" ;
你看看够不够了。
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bruceteen

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巨蟹座 日期:2013-11-19 14:09:4615-16赛季CBA联赛之青岛 日期:2016-07-05 12:36:0515-16赛季CBA联赛之广东 日期:2016-06-29 11:45:542015亚冠之全北现代 日期:2015-07-22 08:09:472015年辞旧岁徽章 日期:2015-03-03 16:54:15巨蟹座 日期:2014-12-29 08:22:29射手座 日期:2014-12-05 08:20:39狮子座 日期:2014-11-05 12:33:52寅虎 日期:2014-08-13 09:01:31巳蛇 日期:2014-06-16 16:29:52技术图书徽章 日期:2014-04-15 08:44:01天蝎座 日期:2014-03-11 13:06:45
3楼 [报告]
发表于 2013-04-19 08:53 |只看该作者
怎样宏定义一个1T大小（或者更大）的数？
------ 没看懂，是不是定义一个数，这个数的数值大于等于1T？
1T也不算大呀，才2^40，而 uint64_t 可以表示 2^64-1；如果是 long double，那就范围更大了
#define T_INT 1099511627776ull
#define T_FLT 1099511627776.0L
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linux_c_py_php

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水瓶座 日期:2013-09-06 12:27:30摩羯座 日期:2013-09-28 14:07:46处女座 日期:2013-10-24 14:25:01酉鸡 日期:2014-04-07 11:54:15
4楼 [报告]
发表于 2013-04-19 10:35 |只看该作者
顶楼上了, uint64_t秒杀啊.
实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？
fender0107401

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水瓶座 日期:2014-04-01 08:53:31天蝎座 日期:2014-04-01 08:53:53天秤座 日期:2014-04-01 08:54:02射手座 日期:2014-04-01 08:54:15子鼠 日期:2014-04-01 08:55:35辰龙 日期:2014-04-01 08:56:36未羊 日期:2014-04-01 08:56:27戌狗 日期:2014-04-01 08:56:13亥猪 日期:2014-04-01 08:56:02亥猪 日期:2014-04-08 08:38:58程序设计版块每日发帖之星 日期:2016-01-05 06:20:00程序设计版块每日发帖之星 日期:2016-01-07 06:20:00
5楼 [报告]
发表于 2013-04-19 11:18 |只看该作者
什么意思？
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add358

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6楼 [报告]
发表于 2013-04-19 11:31 |只看该作者
回复 3# bruceteen


    是定义一个数，假设定义一个1T大小的数！ 如果在32位机中定义的话？
实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？
sonicling

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7楼 [报告]
发表于 2013-04-19 11:35 |只看该作者
#define (1024LL*1024LL*1024LL*1024LL)
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add358

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8楼 [报告]
发表于 2013-04-19 11:38 |只看该作者
回复 7# sonicling


    这样会溢出。
实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？
sonicling

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9楼 [报告]
发表于 2013-04-19 11:44 |只看该作者
回复 8# add358


    谁告诉你的？看清楚LL后缀！
实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？
帅绝人寰

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2015年辞旧岁徽章 日期:2015-03-03 16:54:152015年迎新春徽章 日期:2015-03-04 09:53:17
10楼 [报告]
发表于 2013-04-19 17:54 |只看该作者
ULLONG_MAX

char array[ULLONG_MAX] = { [0 ... ULLONG_MAX -1 ] = 0 };


gcc能否编译出来就不管我事了
实战分享：从技术角度谈机器学习入门| 【大话IT】RadonDB低门槛向MySQL集群下战书 | ChinaUnix打赏功能已上线！ | 新一代分布式关系型数据库RadonDB知多少？
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