limits.h问题 [英] limits.h question
问题描述
snippit代码。如果我代码：
#include< limits.h>
#include< stdio.h>
int main （）
{
printf（最小签名长long：％lld \ n，LLONG_MIN）;
返回0;
}
我得到输出：
最小签名长多头：0
为什么这样？我甚至检查了我的limits.h文件，在那里我看到：
#define LLONG_MIN 0x8000000000000000 / *最小签名__int64值* /
为什么赢了''打印限制？
顺便说一句......这可能不是主题，但如果我在c ++中编写相同的东西
与cout<<它运作正常......很奇怪
Mark Bruno <亚************* @ yahoo.com>在消息中写道
新闻：3M ******************** @ comcast.com ...嘿，我正在学习限制标题，我不明白一个代码的snippit。如果我编码：
#include< limits.h>
#include< stdio.h>
int main（）
{
printf （最小签名长long：％lld \ n，LLONG_MIN）;
返回0;
}
我得到输出：
最小签名长long：0
这是为什么？我甚至检查了我的limits.h文件，我看到了：
#define LLONG_MIN 0x8000000000000000 / *最小签名__int64值
* /
为什么不打印限制？
Mark Bruno写道：嘿，我正在学习限制标题，我不知道理解一个代码的snippit。如果我编码：
#include< limits.h>
#include< stdio.h>
int main（）
{
printf （最小签名长long：％lld \ n，LLONG_MIN）;
返回0;
}
我得到输出：
最小签名长long：0
这是为什么？我甚至检查了我的limits.h文件，我看到了：
#define LLONG_MIN 0x8000000000000000 / *最小签名__int64值* /
为什么不打印限制？
您似乎正在使用< limits.h>不适合你的
编译器。确保你没有不匹配。为了比较，我得到了
我的实现：
#include< limits.h>
#include< stdio .h>
int main（无效）
{
printf（最小签名长多头：％lld \ n，LLONG_MIN ）;
printf（最小签名长：％ld \ n，LONG_MIN）;
printf（最小签名int：％d \ n ，INT_MIN）;
printf（最小签名短：％hd \ n，SHRT_MIN）;
printf（"最小签名字符：％d \ n"，SCHAR_MIN）;
printf（最大签名长long：％lld \ n，LLONG_MAX）;
printf（"最大无符号长long： ％llu \ n"，ULLONG_MAX）;
printf（最大签名长：％ld \ n，LONG_MAX）;
printf（"最大的无符号） long：％lu \ n"，ULONG_MAX）;
printf（" Largest signed int：％d \ n"，INT_MAX）;
printf（"最大的unsigned int：％u \ n&qu ot;，UINT_MAX）;
printf（最大签名短：％hd \ n，SHRT_MAX）;
printf（"最大无符号短：％hu \ n"，USHRT_MAX）;
printf（"最大签名字符：％d \ n"，SCHAR_MAX）;
printf（"最大的unsigned char： ％u \ n"，UCHAR_MAX）;
返回0;
}
最小签名长多头：-9223372036854775808
最小签名长：-2147483648
最小签名int：-2147483648
最小签名短：-32768
最小签名字符：-128
最大签名长多头：9223372036854775807
最大无签名长多头：18446744073709551615
最大签名长：2147483647
最大的无符号长：4294967295
最大签名int：2147483647
最大的unsigned int：4294967295
最大签名短：32767
最大的无符号短片：65535
最大签名字符：127
最大的未签名字符：255
-
Martin Ambuhl
我正在使用MS Visual C ++ 7.1（.net 2003），带有所有合适的标题。
任何有MSVC ++ 7.1的人都可以担保这个bug吗？
" Martin Ambuhl" <毫安***** @ earthlink.net>在消息中写道
news：xF ****************** @ newsread3.news.atl.earth link.net ...Mark Bruno写道：嘿，我正在学习限制标题，而且我不理解一个代码的snippit。如果我编码：
#include< limits.h>
#include< stdio.h>
int main（）
{
printf （最小签名长long：％lld \ n，LLONG_MIN）;
返回0;
}
我得到输出：
最小签名长long：0
这是为什么？我甚至检查了我的limits.h文件，我看到了：
#define LLONG_MIN 0x8000000000000000 / *最小签名__int64值
* /
为什么不打印限制？
您似乎正在使用< limits.h>不适合您的
编译器。确保你没有不匹配。为了比较，我得到了
我的实现：
#include< limits.h>
#include< stdio.h>
int main（void）
{
printf（最小签名长long：％lld \ n，LLONG_MIN）;
printf（最小签名长：％ld \ n，LONG_MIN）;
printf（Smallest signed int：％d \ n，INT_MIN）;
printf（最小签名短：％hd \ n，SHRT_MIN）;
printf（ 最小签名字符：％d \ n，SCHAR_MIN）;
printf（最大签名长long：％lld \ n，LLONG_MAX）;
printf（"最大unsigned long long：％llu \ n"，ULLONG_MAX）;
printf（最大签名长：％ld \ n，LONG_MAX）;
printf（"最大无符号长：％lu \ n，ULONG_MAX）;
printf（Largest signed int：％d \ n，INT_MAX）;
printf（Largest unsigned int：％u \ n，UINT_MAX）;
printf（最大签名短：％hd \ n，SHRT_MAX）;
printf（最大无符号短：％hu \ n，USHRT_MAX）;
printf（最大签名char：％d \ n"，SCHAR_MAX）;
printf（最大的unsigned char：％u \ n，UCHAR_MAX）;
返回0;
}
最小签名长多头：-9223372036854775808
最小签名长：-2147483648
最小签名int：-2147483648
最小签名短：-32768
最小签名字符： - 128
最大签名长多头：9223372036854775807
最大无符号长多头：18446744073709551615
最大签名长：2147483647
最大无符号长：4294967295
最大签名int：2147483647
最大的unsigned int：4294967295
最大的签名短：32767
最大的无符号短：65535
最大的签名字符：127
最大的无符号字符：255
-
Martin Ambuhl
Hey, I''m learning about the limits header, and I don''t understand one
snippit of code. If I code:
#include <limits.h>
#include <stdio.h>
int main()
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
return 0;
}
I get the output:
Smallest signed long long: 0
Why is this? I even check in my limits.h file, where I see:
#define LLONG_MIN 0x8000000000000000 /*minimum signed __int64 value */
Why won''t it print the limit?
By the way...this might be off topic, but if i code the same thing in c++
with cout << it works ok...weird
"Mark Bruno" <ya*************@yahoo.com> wrote in message
news:3M********************@comcast.com...Hey, I''m learning about the limits header, and I don''t understand one
snippit of code. If I code:
#include <limits.h>
#include <stdio.h>
int main()
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
return 0;
}
I get the output:
Smallest signed long long: 0
Why is this? I even check in my limits.h file, where I see:
#define LLONG_MIN 0x8000000000000000 /*minimum signed __int64 value */
Why won''t it print the limit?
Mark Bruno wrote:Hey, I''m learning about the limits header, and I don''t understand one
snippit of code. If I code:
#include <limits.h>
#include <stdio.h>
int main()
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
return 0;
}
I get the output:
Smallest signed long long: 0
Why is this? I even check in my limits.h file, where I see:
#define LLONG_MIN 0x8000000000000000 /*minimum signed __int64 value */
Why won''t it print the limit?
It would seem that you are using a <limits.h> not appropriate for your
compiler. Make sure that you don''t have a mismatch. For comparison, I get
for my implementation:
#include <limits.h>
#include <stdio.h>
int main(void)
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
printf("Smallest signed long: %ld\n", LONG_MIN);
printf("Smallest signed int: %d\n", INT_MIN);
printf("Smallest signed short: %hd\n", SHRT_MIN);
printf("Smallest signed char: %d\n", SCHAR_MIN);
printf("Largest signed long long: %lld\n", LLONG_MAX);
printf("Largest unsigned long long: %llu\n", ULLONG_MAX);
printf("Largest signed long: %ld\n", LONG_MAX);
printf("Largest unsigned long: %lu\n", ULONG_MAX);
printf("Largest signed int: %d\n", INT_MAX);
printf("Largest unsigned int: %u\n", UINT_MAX);
printf("Largest signed short: %hd\n", SHRT_MAX);
printf("Largest unsigned short: %hu\n", USHRT_MAX);
printf("Largest signed char: %d\n", SCHAR_MAX);
printf("Largest unsigned char: %u\n", UCHAR_MAX);
return 0;
}
Smallest signed long long: -9223372036854775808
Smallest signed long: -2147483648
Smallest signed int: -2147483648
Smallest signed short: -32768
Smallest signed char: -128
Largest signed long long: 9223372036854775807
Largest unsigned long long: 18446744073709551615
Largest signed long: 2147483647
Largest unsigned long: 4294967295
Largest signed int: 2147483647
Largest unsigned int: 4294967295
Largest signed short: 32767
Largest unsigned short: 65535
Largest signed char: 127
Largest unsigned char: 255
--
Martin Ambuhl
I''m using MS Visual C++ 7.1 (.net 2003), with all the appropriate headers.
Anyone with MSVC++7.1 out there who can vouch for this bug?
"Martin Ambuhl" <ma*****@earthlink.net> wrote in message
news:xF******************@newsread3.news.atl.earth link.net...Mark Bruno wrote:Hey, I''m learning about the limits header, and I don''t understand one
snippit of code. If I code:
#include <limits.h>
#include <stdio.h>
int main()
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
return 0;
}
I get the output:
Smallest signed long long: 0
Why is this? I even check in my limits.h file, where I see:
#define LLONG_MIN 0x8000000000000000 /*minimum signed __int64 value */
Why won''t it print the limit?
It would seem that you are using a <limits.h> not appropriate for your
compiler. Make sure that you don''t have a mismatch. For comparison, I get
for my implementation:
#include <limits.h>
#include <stdio.h>
int main(void)
{
printf("Smallest signed long long: %lld\n", LLONG_MIN);
printf("Smallest signed long: %ld\n", LONG_MIN);
printf("Smallest signed int: %d\n", INT_MIN);
printf("Smallest signed short: %hd\n", SHRT_MIN);
printf("Smallest signed char: %d\n", SCHAR_MIN);
printf("Largest signed long long: %lld\n", LLONG_MAX);
printf("Largest unsigned long long: %llu\n", ULLONG_MAX);
printf("Largest signed long: %ld\n", LONG_MAX);
printf("Largest unsigned long: %lu\n", ULONG_MAX);
printf("Largest signed int: %d\n", INT_MAX);
printf("Largest unsigned int: %u\n", UINT_MAX);
printf("Largest signed short: %hd\n", SHRT_MAX);
printf("Largest unsigned short: %hu\n", USHRT_MAX);
printf("Largest signed char: %d\n", SCHAR_MAX);
printf("Largest unsigned char: %u\n", UCHAR_MAX);
return 0;
}
Smallest signed long long: -9223372036854775808
Smallest signed long: -2147483648
Smallest signed int: -2147483648
Smallest signed short: -32768
Smallest signed char: -128
Largest signed long long: 9223372036854775807
Largest unsigned long long: 18446744073709551615
Largest signed long: 2147483647
Largest unsigned long: 4294967295
Largest signed int: 2147483647
Largest unsigned int: 4294967295
Largest signed short: 32767
Largest unsigned short: 65535
Largest signed char: 127
Largest unsigned char: 255
--
Martin Ambuhl
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