Assignment $3$

$1/26/17$

Write an Eliza application that fulfills the postcondition specifications below given the precondition.

Each part will build mostly on the previous one. All builds should be submitted, and are weighted equally. The key to evaluating each part of the assignment is on the table in the Syllabus page, under Grading.

$1.$ Build $1$

Implement the functionality specified below. You may use int$(),$ which returns an integer form of a string argument and str$(),$ which returns a string form of an integer argument.

# Eliza$300$

# Intent: A list of helpful actions that a troubled person could take. Build $1$

possible$\_$actions $=[\text{'}$taking up yoga.$\text{'},$ 'sleeping eight hours a night.$\text{'},$ 'relaxing.$\text{'},$

'not working on weekends.$\text{'},$ 'spending two hours a day with friends.$\text{'}]$

$\text{'}\text{'}\text{'}$

Precondition: possible$\_$actions is the list defined above

Postconditions:

$1.($Welcome$)$: A welcome message is on the console

$2.($user$\_$complaint$)$: user$\_$complaint is the user's response to a prompt for the

user's complaint

$3.($how$\_$long$)$: how$\_$long is the user's string response to "How many months have

you experienced $...?"$ AND Eliza$300$ sympathized, mentioning the duration

$4.($Advice$)$:

EITHER how$\_$long $<3$ AND "Please return in $*$ months" is on the console where $*$

is $3-$how$\_$long

OR how$\_$long $>=3$ AND The phrases in possible$\_$action are on separate lines

on the console, each preceded by "Try $".$

$\text{'}\text{'}\text{'}$

$\text{'}\text{'}\text{'}$

Here is an example of the interaction:

$2.$ Build $2$

Implement the functionality specified below.

# Eliza$300$

# Intent: A list of helpful actions that a troubled person could take. Build $2$

possible$\_$actions $=[\text{'}$taking up yoga', 'sleeping eight hours a night', 'relaxing',

'not working on weekends', 'spending two hours a day with friends'$]$

$\text{'}\text{'}\text{'}$

Precondition: possible$\_$actions is the list defined above

Postconditions:

$1.($Welcome$)$: A welcome message is on the console

$2.($user$\_$complaint$)$: user$\_$complaint is the user's response to

"Please describe your emotional complaint$--$in one punctuation$-$free line: $"$

$3.($how$\_$long$)$: how$\_$long is the user's string response to

"How many months $($between $1$ and $99)$ have you experienced $...?"$

$4.($Month validity$)$: EITHER how$\_$long has the requested form

OR this terminated AND "Sorry, illegal input. Eliza is quitting; run Eliza again."

is on the console

$5.($Advice$)$:

EITHER how$\_$long $<3$ AND "Please return in $*$ months" is on the console where $*$

is $3-$how$\_$long

OR how$\_$long $>=3$ AND The phrases in possible$\_$action are on separate lines

on the console, each preceded by "Try $".$

$\text{'}\text{'}\text{'}$

Here are examples of the interaction and note the tip that follows it:

Depending on how you approach this problem, you may find the following information useful:

$3.$ Build $3$

Implement the following specifications:

# Eliza$300$

# Intent: A list of helpful actions that a troubled person could take. Build $2$

possible$\_$actions $=[\text{'}$taking up yoga', 'sleeping eight hours a night', 'relaxing',

'not working on weekends', 'spending two hours a day with friends'$]$

$\text{'}\text{'}\text{'}$

Precondition: possible$\_$actions is the list defined above

Postconditions:

$1.($Welcome$)$: A welcome message is on the console

$2.($user$\_$complaint$)$: user$\_$complaint is the user's response to

"Please describe your emotional complaint$--$in one punctuation$-$free line: $"$

$3.($how$\_$long$)$: how$\_$long is the user's string response to

"How many months $($between $1$ and $99)$ have you experienced $...?"$

$4.($Month validity$)$: EITHER how$\_$long has the requested form

OR this terminated AND "Sorry, illegal input. Eliza is quitting; run Eliza again."

is on the console

$5.($Advice$)$: EITHER how$\_$long $>=3$

OR "Please return in $*$ months" is on the console where $*$ is $3-$ how$\_$long

$6.($actions$\_$not$\_$taken$)$: actions$\_$not$\_$taken consists of the actions $($elements$)$ in

possible$\_$actions that the user answered $\text{'}$n$\text{'}$ to when questioned "Have you tried..."

$7.($Summarized$)$: Eliza$300$ recommended that the user take the actions in

actions$\_$not$\_$taken

$\text{'}\text{'}\text{'}$

Here is a typical example of an interaction:

Depending on how you implement this, you may find the following useful: