C/C++-programming language funktioniert nicht

This is an ios c/c++ app,you can learn,run,share c/c++ code .  In(the built-in browser or the txt editor),Select the text to run.  Code templates,the contents of the new file is copy from contents of the template file. *You can enter c/c++ code by keyboard, then you can execut the c/c++ code,support the cin,scanf function. *You can adjust the code color and font size , and support to move the cursor left and right and up and down , easy to read and write. *You can find learning materials by the built-in browser . *You can save c/c++ code and learning materials, and can be modified to the save file and delete the save file . *The file system supports txt, pdf, chm, mp3,m4v,zip, gif, png, html, c ,cpp ,doc... *You can control the background image and color, and execution voice , background animation, text color and shadow, switch interface animation , the number and the order of the main interface of the tab bar to create your learning software. *You can Learn c/c++ knowledge , the system provides some basic learning materials . *You can use c/c++ code or learning materials to generate two-dimensional code , for easy sharing . *You can share code by Email,Weibo,Twitter,Facebook. *You can use the counter,light in the Setting tab.