$4$: zyLab training: Interleaved input $/$ output

$1\mathrm{.}14$ zyLab training: Interleaved input $/$ output

Auto$-$graded programming assignments have numerous advantages, but have some challenges too. Students cor realizing that example input $/$ output provided in an assignment's specification interleaves input and output, but th output the output parts. If a program should double its input, an instructor might provide this example:

Enter x:

$5$

$x$ doubled is: $10$

Students often incorrectly create a program that outputs the $5.$ Instead, the program should only output the output

Enter $x$ :

$x$ doubled ifs: $10$

The instructor's example is showing both the output of the program, AND the user's input to that program, assuming developed in an environment where a user is interacting with a program. But the program itself doesn't output the $5$ following the $5,$ which occurs when the user types $5$ and presses enter$).$

Also, if the instructor configured the test cases to observe whitespace, then according to the above example, the prog newline after Enter $x$ : $($and possibly after the $10,$ if the instructor's test case expects that$).$

The program below incorrectly echoes the user's input to the output.

Try submitting it for grading $($click "Submit mode", then "Submit for grading"$).$ Notice that the test cases fail. The highlighting indicates that output $3$ and newline were not expected. In the second test case, the $-5$ and newline w

Remove the