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--- haas:spring2017:cprog:projects:mbe0 [2017/02/07 21:22] – [Output Specification] wedge
+++ haas:spring2017:cprog:projects:mbe0 [2017/02/15 15:42] (current) – [Total output comparison] wedge
@@ Line 8: / Line 8: @@
 ======Project: MENTAL MATH - MULTIPLY BY 11 (mbe0)======
+=====Errata=====
+  * Added verification section to facilitate project output specification compliance (20170207)
+  * Added automatic verification subsection to verification section (20170208)
 =====Objective=====
 To implement a programmatic solution (ie simulation) of a real life process- the mental math trick of multiplying any two- or three-digit number by eleven.
@@ Line 314: / Line 318: @@
 lab46:~/src/cprog/mbe0$
 </cli>
+====Total output comparison====
+If you'd like to check if the entirety of your output is correct (especially in relation to spacing), you can do the following.
+I have saved sample (correct) outputs on the system that you can check against. The following commands will let you do so:
+===First, save your output to a file===
+I have saved program outputs for the following inputs:
+  * 37
+  * 73
+  * 128
+  * 480
+  * 907
+  * 933
+If you run your program with one of these same inputs, you can compare your results for correctness.
+In the below example, I do this for an input value of 37:
+<cli>
+lab46:~/src/cprog/mbe0$ ./mbe0 <<< 37 2>output.37 1>>output.37
+lab46:~/src/cprog/mbe0$
+</cli>
+What we have done is fed in the input via a here string (form of STDIN redirect), and then output both STDERR and STDOUT into a common file (appending STDOUT, after the STDERR output).
+You should now have a file called **output.37** in your current directory.
+===Next, check it against mine===
+I have these files (by the same names), saved in the CPROG Public Directory (under the **mbe0** directory).
+By using the **diff** command, you can see differences, if any. If there are no differences, the output matches (this is good, and what you want).
+<cli>
+lab46:~/src/cprog/mbe0$ diff output.37 /var/public/cprog/mbe0/output.37
+lab46:~/src/cprog/mbe0$
+</cli>
+If you see output, that means there are differences, and that your output likely isn't in conformance with project specifications.
+You can repeat this for the other data files (output.73 for an input of 73, etc.)
+===Isolate just the STDOUT or the STDERR===
+Additionally, you may want to specifically look at your program's STDOUT or STDERR independent of each other.
+To do this, you can do the following.
+To isolate STDOUT and STDERR into separate files, you can do the following:
+<cli>
+lab46:~/src/cprog/mbe0$ ./mbe0 <<< 37 1>stdout.37 2>stderr.37
+lab46:~/src/cprog/mbe0$
+</cli>
+You can then compare those particular collections of information against my copies (located in the **mbe0** subdirectory of the CPROG Public Directory, by the same file names).
+====automated verification====
+I have rigged up **pchk** to work for this project; it will check for differences and compare MD5sum hashes for stderr, stdout, and total (combined) output.
+Once you have everything complete, this is a good final check to do to ensure everything is in order.
+<cli>
+lab46:~/src/cprog/mbe0$ pchk cprog mbe0
+===================================================
+=          mbe0 output validation check           =
+===================================================
+      stderr diff: MATCH    stderr md5sum: MATCH
+[ 37] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+      stderr diff: MATCH    stderr md5sum: MATCH
+[ 73] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+      stderr diff: MATCH    stderr md5sum: MATCH
+[128] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+      stderr diff: MATCH    stderr md5sum: MATCH
+[480] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+      stderr diff: MATCH    stderr md5sum: MATCH
+[907] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+      stderr diff: MATCH    stderr md5sum: MATCH
+[933] stdout diff: MATCH    stdout md5sum: MATCH
+      output diff: MATCH    output md5sum: MATCH
+===================================================
+=     matches: 36, mismatches:  0, total: 36      =
+===================================================
+lab46:~/src/cprog/mbe0$
+</cli>
+Since your project submission will be evaluated in part by compliance to output specifications, you probably want to check to see how you are doing before submitting.
 =====Reflection=====
 Be sure to provide any commentary on your journal regarding realizations had and discoveries made during your pursuit of this project.
@@ Line 325: / Line 425: @@
   * Code must compile cleanly (no warnings or errors)
+    * Again, I will be compiling as follows: gcc -Wall -o mbe0 mbe0.c
   * Submit the program in a file called **mbe0.c**
   * Output must be correct, and match the form given in the sample output above.

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