浮点数到二进制 [英] Floating point number to binary
问题描述
我想使用C程序将浮点数（或十进制数字表示
123.456）转换为二进制表示法。有人可以帮我吗
用它吗？
谢谢
Gaurav
-
comp.lang.c.moderated - 审核地址： cl**@plethora.net
Gaurav Verma写道：
我想转换浮点数（或十进制数字说
123.456 ）使用C程序的二进制表示法。有人可以帮我吗？
我不认为你想要做的很清楚。例如，你认为小数点的二进制表示是什么？
？你是否想要学习一些东西，而不是实际上做*做某事？
如果是这样，你想学什么？
ve ********** @ gmail.com （Gaurav Verma）写道：
我想使用C程序将浮点数（或十进制数字表示
123.456）转换为二进制表示法。有人可以帮我吗？
如果你想要浮点数的基础IEEE表示
数你可以使用联合来访问各个字节。
例如联盟{double d; struct {unsigned char byte [8]; ieee; } $;
-
Brian Gough
网络理论有限公司，
出版GCC简介 --- http://www.network-theory.co.uk/ gcc /
Brian Gough写道：ve ********** @ gmail.com （Gaurav Verma）写道：
我想要使用C程序将浮点数（或十进制数字表示为
123.456）转换为二进制表示法。有人可以用它来帮助我吗？
如果你想要一个浮点数的基础IEEE表示，你可以使用一个联合来访问各个字节。
例如联盟{double d; struct {unsigned char byte [8];} ieee; } u;
不，你不能，至少不可移植。你可以做的是设置一个
指针指向存储并通过它访问它。
#include< stdio.h>
int main（无效）
{
双d;
unsigned char * p;
unsigned int i;
d = 123.4; / *或其他* /
p =（unsigned char *）（& d）;
for（i = 0; i< sizeof（double）; i ++） {
printf（"％2x"，p [i]）;
/ *用p [i] * /
$ b做其他事情$ b}
putchar（''\ n''）;
返回0;
}
-
这是一个很好的答案。这是偏离主题的，它是不正确的，
并且它没有回答这个问题。 - 理查德希思菲尔德
我支持红袜队和击败洋基队的任何球队
Hi,
I want to convert a floating point number (or a decimal number say
123.456) into binary notation using a C program. Can somebody help me
out with it?
Thanks
Gaurav
--
comp.lang.c.moderated - moderation address: cl**@plethora.net
Gaurav Verma writes:
I want to convert a floating point number (or a decimal number say
123.456) into binary notation using a C program. Can somebody help me
out with it?
I don''t think it is very clear what you are trying to do. For example, what
do you think the binary representation of a decimal point is? Are you
trying to learn something, as opposed to than actually *doing* something?
If so, what are you trying to learn?
ve**********@gmail.com (Gaurav Verma) writes:
I want to convert a floating point number (or a decimal number say
123.456) into binary notation using a C program. Can somebody help me
out with it?
If you want the underlying IEEE representation of a floating point
number you can use a union to access the individual bytes.
e.g. union { double d; struct { unsigned char byte[8]; } ieee ; } u;
--
Brian Gough
Network Theory Ltd,
Publishing "An Introduction to GCC" --- http://www.network-theory.co.uk/gcc/
Brian Gough wrote:ve**********@gmail.com (Gaurav Verma) writes:I want to convert a floating point number (or a decimal number say
123.456) into binary notation using a C program. Can somebody help
me out with it?
If you want the underlying IEEE representation of a floating point
number you can use a union to access the individual bytes.
e.g. union {double d; struct { unsigned char byte[8];} ieee ; } u;
No you can''t, at least not portably. What you can do is set up a
pointer to the storage and access it via that.
#include <stdio.h>
int main(void)
{
double d;
unsigned char *p;
unsigned int i;
d = 123.4; /* or whatever */
p = (unsigned char *)(&d);
for (i = 0; i < sizeof(double); i++) {
printf("%2x ", p[i]);
/* do other things with p[i] */
}
putchar(''\n'');
return 0;
}
--
"This is a wonderful answer. It''s off-topic, it''s incorrect,
and it doesn''t answer the question." -- Richard Heathfield
"I support the Red Sox and any team that beats the Yankees"
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