shell - Why does my bash function return the wrong value? - 


  तथ्य () {यदि [$ 1 -q 1] फिर 1 और y लौटें = 'expr $ 1 - 1' तथ्य $ yb = $ (($ 1 * $?)) $ $ वापस लौटाएंगे "एन्टर करें" को पढ़ने के लिए तथ्य $ n प्रतिध्वनि "$?"

यह एक संख्या का फ़ैक्टोरियल खोजने के लिए एक कार्यक्रम है। उत्पादन 5 तक सही है। 6 का उत्पादन 208 के रूप में दे रहा है, लेकिन सही उत्तर 720 है। इस त्रुटि का कारण क्या है?

फ़ंक्शन रिटर्न मान केवल 255 तक जा सकते हैं: 

  a () {return 255} एक गूंज $? बी () {वापसी 256} बी प्रति ईको $?

उत्पादन: 

  $ bash x.sh 255 0

वापसी है जैसे exit और exit केवल 255 () तक के मान ले सकते हैं।

एक वैकल्पिक एक पुनरावर्ती सुझाव पर स्विच करना है, जैसा कि एक अन्य उत्तर में वर्णित है । वैकल्पिक रूप से आप प्रतिध्वन का उपयोग करके पुनरावर्ती आउटपुट को इस तरह से कैप्चर कर सकते हैं: 

  #! / Bin / bash fact () {यदि [$ 1 -q 1] तब 1 और ycho = $ (expr $ 1 - 1) एफ = $ (तथ्य $ y) b = $ (($ 1 * $ f)) echo $ b f} एकोरो "एन्टर" पढें n तथ्य $ n

-

Comments

Post a Comment

Popular posts from this blog

google indexing -

I have a question, how can I get results of similar Google results like Wikipedia, MySpace ... When you search Wikipedia on Google, you have the result of an input search for Wikipedia, which is user-friendly. When you search MySpace on Google, you have Google results below, some links: login, register, sign up, search ... I actually do this on Google for my website Want a kind result? Thank you. itemprop = "text"> create a sitemap: Custom Search Engine Create: Thanks Google!
Read more

wpf controls - Trigger on Image inside a Button WPF -

I want to control the visibility of the image in a button through a trigger: & lt; Button x: name = "notespanel" command = "{binding adddocument}" & gt; & Lt; Image x: name = "notes image" source = "notes" "height =" 32 "& gt; & gt; & gt; & gt; button & gt; 1 / What trigger will appear in the button or in the container that faces the button? 2 / How to set the visibility of the image? Thanks Zone Since you are updating the image, it should lie with the image (style of image as part) such as if the image is by default Is hidden, so I try the following Using R can choose to make it visible with toggleproperty1. DataTrigger binding = "{binding toggleproperty}" value = "1" & gt; & lt ; Setter Property = "Visibility" value = "View" />
Read more

wpf - Converter stops filter working -

I'm trying to display the file name in a listbox, taken from a special directory. They are stored in an ObservableCollection of FileInfo Object: Public supervision & lt; FileInfo & gt; Project Files {Get (empty (selected folder == empty); DirectoryInfo D = New Directory Info (SelectedFolder); if (! D.Extists) returns empty; New Observe Collection & lt; FileInfo & gt; (d.EnumerateFiles ( Return "* .xsi")}}} When a text is entered or a text box has changed in "FilesFilterBy" I applied a filter on the listbox, called Is: Private Zero FilterFiles_TextChanged (Object Sender, TextChangedEventArgs e) {ICollectionView View = Archive Source.GetDefaultView (ProjectFiles); see.filters = new new & amp; object> (IsTextInFilename);} public bool isTextInFilename (object item) {string file name = path.GetFileNameWithoutExtension (as fileInfo) .Name item Returns (filename. ToLower (). Includes (File Byte Text. Taylor ());} At the same time,...
Read more