Excel VM is a compiler for I/O based operations in the C programming language which allows you to execute source code in a Microsoft Excel spreadsheet.

This is an online demo. Enter your source code, along with optional input data, and you are ready to compile. On the spreadsheet, your stdin data is stored in cell A2, and stdout is stored in cell B2.

Download the latest release here, click here to try some samples, or view the source code on Github.