Repl.it is an online compiler that you can use to run your programs without having any local applications like Visual Studio or Code Blocks. A good point about Repl.it is that you can read from file or write in a file in it. Most of the online compilers does not have this feature and I always have this problem with them.
I created a video about how to use Repl.it on YouTube. The link below will forward you to the video: How to use Repl.it
Hope you enjoy the video and here is the link to Repl.it: Repl.it