How to run or compile any code in Tough+Hydrate?

Hi! I am a beginner, recently my college has bought Tough+Hydrate. As I started to learn this software, I got stuck at the very first step. I thought to run the solved examples available, but as I start writing the code, the first comment appears after I press the enter is PROBLEM TITLE followed by the whatever I scripted in my first line. 

and I write anything after that and press enter, the application closes off. 

I don't know if I am doing it in a manner or not. If any other application is required to write the code on and compile it anywhere else. Please guide me. 

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