Added extra comments.

src/main.rs

@@ -115,9 +115,9 @@ fn main()
 		prisoners.push(prisoner_i);
 	}
 
-	// if any prisoner has not found their number
 	if !opts.json
 	{
+		// if any prisoner has not found their number
 		if prisoners.iter().any(|i| !i.found)
 		{
 			println!("failure");
@@ -129,6 +129,7 @@ fn main()
 	}
 	else
 	{
+		// export data to JSON format
 		let out_json = serde_json::to_string(&prisoners).unwrap();
 		println!("{}", out_json);
 	}