EE 20 lab 03 Finite State Machine Deterministic Cat

%% clear all the variables
clear

%% cut string
x='ring'; x(1:3)
%% ans = rin

%% concatenate string
x='ring';
y = 'the?
z = 'bell?
[x, y, z]
%% ans = ringthebell

%% cell array
>> c = {'ring' 'offhook' 'end greeting' 'end message' 'absent'};
>> c(1)
%% ans = 'ring'

%% Present Working Directory
pwd

%% HELLO - Say hello.
disp('Hello');


%% For-loop to count 'a'
>> d = {'a' 'b' 'a' 'a' 'b'};
>> count = 0;
>> for i = 1:length(d),
if strcmp(d(i), 'a')
count = count + 1;
end;
end;

>> count
%%count = 3

%%function with 1 argument
function result = reverse(argument)
% REVERSE - return the argument array reversed.
result = argument(length(argument):-1:1);

%% multi-variable function assignments
function [result1, result2] = myfunction(arg1, arg2)
>> [r1, r2] = myfunction(a1, a2);

%% give the path to search for .m files
>> path(path, 'U:\lab03\');

count.m
function result = count(argument)
% COUNT - count the number of character in a set.
result = 0;
for i = 1:length(argument),
if strcmp(argument(i), 'a')
result = result + 1;
end;
end;

%% Count the number of 'a' from count.m
path(path, 'U:\lab03\');
count({'a', 'b', 'c', 'a', 'aa'})
%% ans = 2
count(['a', 'b', 'c', 'a', 'aa'])
%% ans = 4

countas.m
% COUNTAS - Count the number of a抯 in the input.
while 1
response = input('Enter a string:','s');
if (strcmp(response,'quit') |...
strcmp(response,'exit'))
break;
end
disp(count(response));
end
>> countas
%Enter a string:hahah
% 2

%Enter a string:quit
>>

update.m
function [next, output] = update(state, input)
%% implementation of the C4. State machine
switch input
case '0'
next = 0;
if state output = '1';
else output = '0';
end
case '1'
next = 1;
if state output = '1';
else output = '0';
end
otherwise
next = state;
output = 'absent';
end

delay.m
% DELAY - Just keep calling update
state = 0;
while 1
in = input('Enter 0, 1, absent, or quit: ', 's');
if (strcmp(in, 'quit') | strcmp(in, 'exit'))
break;
end
[state, output] = update(state, in);
disp(output);
end

%>> delay
%Enter 0, 1, absent, or quit: 0
%0
%Enter 0, 1, absent, or quit: 1
%0
%Enter 0, 1, absent, or quit: 0
%1
%Enter 0, 1, absent, or quit: 1
%0
%Enter 0, 1, absent, or quit: 2
%absent
%Enter 0, 1, absent, or quit: quit

%catForever.m
inputs = input('Input:', 's');
% initial state
s = 'happy';
while ~strcmp(inputs, 'quit') && ~strcmp(inputs, 'exit')
disp(['The Cat was "',s,'", before the "',feeder(s,inputs),'"']);
[s, y] = update(s, feeder(s,inputs));
%display output and state
disp(['The Cat "',y, '", it is going to be "',s,'"']);
if strcmp(y, 'dies')
break;
end;
inputs = input('Input:','s');
end;

%feeder.m
function [output] = feeder (state, input)
%feed when 1 or time passes
if ((strcmp(input, '1')||strcmp(input,'time passes'))...
&& strcmp(state, 'hungry') ) output='feed';
%time passes when input is 1 and state != hungry
else if (strcmp(input, '1')) output='time passes';
%all other inputs are fine, let them be
else output=input;
end
end

% catForever Output
>> catForever
Input:1
The Cat was "happy", before the "time passes"
The Cat "rubs", it is going to be "hungry"
Input:1
The Cat was "hungry", before the "feed"
The Cat "purrs", it is going to be "happy"
Input:time passes
The Cat was "happy", before the "time passes"
The Cat "rubs", it is going to be "hungry"
Input:time passes
The Cat was "hungry", before the "feed"
The Cat "purrs", it is going to be "happy"
Input:time passes
The Cat was "happy", before the "time passes"
The Cat "rubs", it is going to be "hungry"
Input:pet
The Cat was "hungry", before the "pet"
The Cat "bites", it is going to be "hungry"
Input:quit