title: Unzip all files in a folder using 7zip in CMD line
body: <p>i'm using these lines to extract all JAR files in a folder, destination can be the same one :</p>
  
  <pre><code>&lt;b&gt;set SEVENZIP_EXE=C:\Program Files\7-Zip\&lt;br&gt;
  set INPUT_FOLDER=D:\jar
  
  for /f "tokens=1-2 delims=. " %%a in ('dir *.jar /a-d/b') do "%SEVENZIP_EXE%" x -aoa -o"%INPUT_FOLDER%" %%a.%%b
  </code></pre>
  
  <p>But all what i got is : %%a was unexpected at this time.
  !!</p>
  
  <p>any suggestion ?<br>
  Thanks</p>