blocks|key|3353154|text|echo+"obase=16;+34"+%7C+bc|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3353155|如果要过滤整个整数文件，则每行一个：|unstyled|3353156|(+echo+"obase=16"+;+cat+file_of_integers+)+%7C+bc|3353157|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>echo "obase=16; 34" | bc
</code></pre>

If you want to filter a whole file of integers, one per line:

<pre><code>( echo "obase=16" ; cat file_of_integers ) | bc
</code></pre>

blocks|key|4198744|text|试用过printf(1)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4198745|printf+"%25x\n"+34
22|code-block|syntax|javascript|4198746|可能有在所有shell中使用内置函数来实现这一点的方法，但它的可移植性较差。我还没有检查POSIX+sh规范，看看它是否具有这样的功能。|4198747|entityMap^0|3|9|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

Tried <code>printf(1)</code>?

<pre><code>printf "%x\n" 34
22
</code></pre>

There are probably ways of doing that with builtin functions in all shells but it would be less portable. I've not checked the POSIX sh specs to see whether it has such capabilities.

blocks|key|3353218|text|从十六进制到十进制的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3353219|$+echo+$((0xfee10000))
4276158464|code-block|syntax|javascript|3353220|从十进制到十六进制的：|3353221|$+printf+'%25x\n'+26
1a|3353222|entityMap^0|A|1|0|0|A|1|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

Hexidecimal to decimal:

<pre><code>$ echo $((0xfee10000))
4276158464
</code></pre>

Decimal to hexadecimal:

<pre><code>$ printf '%x\n' 26
1a
</code></pre>

blocks|key|135501|text|bash-4.2$+printf+'%25x\n'+4294967295
ffffffff

bash-4.2$+printf+-v+hex+'%25x'+4294967295
bash-4.2$+echo+$hex
ffffffff|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|135502|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>bash-4.2$ printf '%x\n' 4294967295
ffffffff

bash-4.2$ printf -v hex '%x' 4294967295
bash-4.2$ echo $hex
ffffffff
</code></pre>

blocks|key|135489|text|对不起，是我的错，试试这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135490|#!/bin/bash
:

declare+-r+HEX_DIGITS="0123456789ABCDEF"

dec_value=$1
hex_value=""

until+[+$dec_value+==+0+];+do

++++rem_value=$((dec_value+%25+16))
++++dec_value=$((dec_value+/+16))

++++hex_digit=${HEX_DIGITS:$rem_value:1}

++++hex_value="${hex_digit}${hex_value}"

done

echo+-e+"${hex_value}"|code-block|syntax|javascript|135491|示例：|135492|$+./dtoh+1024
400|135493|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Sorry my fault, try this...

<pre><code>#!/bin/bash
:

declare -r HEX_DIGITS="0123456789ABCDEF"

dec_value=$1
hex_value=""

until [ $dec_value == 0 ]; do

 rem_value=$((dec_value % 16))
 dec_value=$((dec_value / 16))

 hex_digit=${HEX_DIGITS:$rem_value:1}

 hex_value="${hex_digit}${hex_value}"

done

echo -e "${hex_value}"
</code></pre>

Example:

<pre><code>$ ./dtoh 1024
400
</code></pre>

blocks|key|135399|text|尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135400|printf+"%25X\n"+${MY_NUMBER}|code-block|syntax|javascript|135401|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try:

<pre><code>printf "%X\n" ${MY_NUMBER}
</code></pre>

blocks|key|4198817|text|在zsh中，你可以做这样的事情：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4198818|%25+typeset+-i+16+y
%25+print+$((+[#8]+x+=+32,+y+=+32+))
8#40
%25+print+$x+$y
8#40+16#20
%25+setopt+c_bases
%25+print+$y
0x20|code-block|syntax|javascript|4198819|取自zsh+docs+page+about+Arithmetic+Evaluation的例子。|4198820|我相信Bash也有类似的能力。|4198821|entityMap|0|LINK|mutability|MUTABLE|url|http://zsh.sourceforge.net/Doc/Release/Arithmetic-Evaluation.html^0|1|3|0|0|2|3|2|15|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|M|3|N|5|6|7|16|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

In <code>zsh</code> you can do this sort of thing:

<pre><code>% typeset -i 16 y
% print $(( [#8] x = 32, y = 32 ))
8#40
% print $x $y
8#40 16#20
% setopt c_bases
% print $y
0x20
</code></pre>

Example taken from <a href="http://zsh.sourceforge.net/Doc/Release/Arithmetic-Evaluation.html" rel="nofollow noreferrer"><code>zsh</code> docs page about Arithmetic Evaluation</a>.

I believe Bash has similar capabilities.

blocks|key|929921|text|在我的例子中，我偶然发现了一个使用printf解决方案的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|929922|$+printf+"%25x"+008+bash:+printf:+008:+invalid+octal+number|offset|length|style|CODE|929923|最简单的方法是使用bc的解决方案，建议在更高的帖子中：|929924|$+bc+<<<+"obase=16;+008"+8|929925|entityMap^0|0|0|1L|0|0|0|Q|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

In my case, I stumbled upon one issue with using printf solution:

<code>$ printf "%x" 008
bash: printf: 008: invalid octal number</code>

The easiest way was to use solution with bc, suggested in post higher:

<code>$ bc &lt;&lt;&lt; "obase=16; 008"
8</code>

blocks|key|3353292|text|xd()+{
++++printf+"hex>+"
++++while+read+i
++++do
++++++++printf+"dec++$((+0x${i}+))\n\nhex>+"
++++done
}
dx()+{
++++printf+"dec>+"
++++while+read+i
++++do
++++++++printf+'hex++%25x\n\ndec>+'+$i
++++done
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3353293|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>xd() {
 printf "hex&gt; "
 while read i
 do
 printf "dec $(( 0x${i} ))\n\nhex&gt; "
 done
}
dx() {
 printf "dec&gt; "
 while read i
 do
 printf 'hex %x\n\ndec&gt; ' $i
 done
}
</code></pre>

blocks|key|4198877|text|#+number+conversion.

while+`test+$ans='y'`
do
++++echo+"Menu"
++++echo+"1.Decimal+to+Hexadecimal"
++++echo+"2.Decimal+to+Octal"
++++echo+"3.Hexadecimal+to+Binary"
++++echo+"4.Octal+to+Binary"
++++echo+"5.Hexadecimal+to++Octal"
++++echo+"6.Octal+to+Hexadecimal"
++++echo+"7.Exit"

++++read+choice
++++case+$choice+in

++++++++1)+echo+"Enter+the+decimal+no."
+++++++++++read+n
+++++++++++hex=`echo+"ibase=10;obase=16;$n"%7Cbc`
+++++++++++echo+"The+hexadecimal+no.+is+$hex"
+++++++++++;;

++++++++2)+echo+"Enter+the+decimal+no."
+++++++++++read+n
+++++++++++oct=`echo+"ibase=10;obase=8;$n"%7Cbc`
+++++++++++echo+"The+octal+no.+is+$oct"
+++++++++++;;

++++++++3)+echo+"Enter+the+hexadecimal+no."
+++++++++++read+n
+++++++++++binary=`echo+"ibase=16;obase=2;$n"%7Cbc`
+++++++++++echo+"The+binary+no.+is+$binary"
+++++++++++;;

++++++++4)+echo+"Enter+the+octal+no."
+++++++++++read+n
+++++++++++binary=`echo+"ibase=8;obase=2;$n"%7Cbc`
+++++++++++echo+"The+binary+no.+is+$binary"
+++++++++++;;

++++++++5)+echo+"Enter+the+hexadecimal+no."
+++++++++++read+n
+++++++++++oct=`echo+"ibase=16;obase=8;$n"%7Cbc`
+++++++++++echo+"The+octal+no.+is+$oct"
+++++++++++;;

++++++++6)+echo+"Enter+the+octal+no."
+++++++++++read+n
+++++++++++hex=`echo+"ibase=8;obase=16;$n"%7Cbc`
+++++++++++echo+"The+hexadecimal+no.+is+$hex"
+++++++++++;;

++++++++7)+exit+
++++++++;;
++++++++*)+echo+"invalid+no."+
++++++++;;

++++esac
done|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4198878|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code># number conversion.

while `test $ans='y'`
do
 echo "Menu"
 echo "1.Decimal to Hexadecimal"
 echo "2.Decimal to Octal"
 echo "3.Hexadecimal to Binary"
 echo "4.Octal to Binary"
 echo "5.Hexadecimal to Octal"
 echo "6.Octal to Hexadecimal"
 echo "7.Exit"

 read choice
 case $choice in

 1) echo "Enter the decimal no."
 read n
 hex=`echo "ibase=10;obase=16;$n"|bc`
 echo "The hexadecimal no. is $hex"
 ;;

 2) echo "Enter the decimal no."
 read n
 oct=`echo "ibase=10;obase=8;$n"|bc`
 echo "The octal no. is $oct"
 ;;

 3) echo "Enter the hexadecimal no."
 read n
 binary=`echo "ibase=16;obase=2;$n"|bc`
 echo "The binary no. is $binary"
 ;;

 4) echo "Enter the octal no."
 read n
 binary=`echo "ibase=8;obase=2;$n"|bc`
 echo "The binary no. is $binary"
 ;;

 5) echo "Enter the hexadecimal no."
 read n
 oct=`echo "ibase=16;obase=8;$n"|bc`
 echo "The octal no. is $oct"
 ;;

 6) echo "Enter the octal no."
 read n
 hex=`echo "ibase=8;obase=16;$n"|bc`
 echo "The hexadecimal no. is $hex"
 ;;

 7) exit 
 ;;
 *) echo "invalid no." 
 ;;

 esac
done
</code></pre>

blocks|key|3353281|text|这不是一个shell脚本，但它是我用来在bin/oct/dec/hex之间转换数字的cli工具：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353282|++++#!/usr/bin/perl

++++if+(@ARGV+<+2)+{
++++++printf("Convert+numbers+among+bin/oct/dec/hex\n");
++++++printf("\nUsage:+base+b/o/d/x+num+num2+...+\n");
++++++exit;
++++}

++++for+($i=1;+$i<@ARGV;+$i%2B%2B)+{
++++++if+($ARGV[0]+eq+"b")+{
++++++++++++++++++++$num+=+oct("0b$ARGV[$i]");
++++++}+elsif+($ARGV[0]+eq+"o")+{
++++++++++++++++++++$num+=+oct($ARGV[$i]);
++++++}+elsif+($ARGV[0]+eq+"d")+{
++++++++++++++++++++$num+=+$ARGV[$i];
++++++}+elsif+($ARGV[0]+eq+"h")+{
++++++++++++++++++++$num+=+hex($ARGV[$i]);
++++++}+else+{
++++++++++++++++++++printf("Usage:+base+b/o/d/x+num+num2+...+\n");
++++++++++++++++++++exit;
++++++}
++++++printf("0x%25x+=+0d%25d+=+0%25o+=+0b%25b\n",+$num,+$num,+$num,+$num);
++++}|code-block|syntax|javascript|3353283|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is not a shell script, but it is the cli tool I'm using to convert numbers among bin/oct/dec/hex:

<pre><code> #!/usr/bin/perl

 if (@ARGV &lt; 2) {
 printf("Convert numbers among bin/oct/dec/hex\n");
 printf("\nUsage: base b/o/d/x num num2 ... \n");
 exit;
 }

 for ($i=1; $i&lt;@ARGV; $i++) {
 if ($ARGV[0] eq "b") {
 $num = oct("0b$ARGV[$i]");
 } elsif ($ARGV[0] eq "o") {
 $num = oct($ARGV[$i]);
 } elsif ($ARGV[0] eq "d") {
 $num = $ARGV[$i];
 } elsif ($ARGV[0] eq "h") {
 $num = hex($ARGV[$i]);
 } else {
 printf("Usage: base b/o/d/x num num2 ... \n");
 exit;
 }
 printf("0x%x = 0d%d = 0%o = 0b%b\n", $num, $num, $num, $num);
 }
</code></pre>

blocks|key|135602|text|哇，我不知道在shell中也有printf！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135603|说到这里，我很惊讶没有人评论把printf放到shell脚本中(如果你愿意，你可以把它放到你的个人bin目录中)。|135604|echo+"printf+"0x%25x\n“$1”>十六进制chmod+%2Bx十六进制|135605|现在只需运行：./hex+123|135606|返回:+0x7b|135607|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Wow, I didn't realize that printf was available at the shell!
With that said, I'm surprised no-one commented about putting the printf into a shell script (which then you could put in your personal bin directory if you wanted).
echo &quot;printf &quot;0x%x\n&quot; $1&quot; &gt; hex
chmod +x hex
Now just run:
./hex 123
It returns:
0x7b

In a UNIX shell script, what can I use to convert decimal numbers into hexadecimal? I thought od would do the trick, but it's not realizing I'm feeding it ASCII representations of numbers.

printf? Gross! Using it for now, but what else is available?

Convert decimal to hexadecimal in UNIX shell script

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在UNIX shell脚本中，我可以使用什么将十进制数字转换为十六进制？我以为od可以做到这一点，但它没有意识到我正在向它提供数字的ASCII表示。printf？真恶心！现在使用它，但是还有什么可用的呢？

问在UNIX shell脚本中将十进制转换为十六进制
EN

回答 12

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问在UNIX shell脚本中将十进制转换为十六进制
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