Write the Panel class per this Module. $("$Write a class" means to write an H and a CPP$,$ named as the class is named.$)$ Test it with this $\_$testPanel.cpp:

$//$ c$++\_$testPanel.cpp Panel.cpp

#include

using namespace std;

#include "Panel.h$"$

int main$()$

$\{$

Panel p;

p$.$addButton$("1")$;

p$.$addButton$("2")$;

p$.$addButton$("3")$;

p$.$addButton$("4")$;

if $($p$.$areAnyLit$())$ cout $<<"$

ERROR $1$

$"$;

if $($p$.$isLit$("2"))$ cout $<<"$

ERROR $2$

$"$;

p$.$press$("$X$")$;

p$.$press$("2")$;

p$.$press$("3")$;

cout $<<"$

EXPECTED: $[2][3]$

$"$;

cout $<<$ "ACTUAL: $"<<$ p $<<$ endl;

p$.$clear$("$Y$")$;

p$.$clear$("2")$;

cout $<<"$

EXPECTED: $[3]$

$"$;

cout $<<$ "ACTUAL: $"<<$ p $<<$ endl;

cout $<<"$

EXPECTED: $3$

$"$;

cout $<<$ "ACTUAL: $"<<$ p$.$getFirstLit$()<<$ endl;

if $(!$p$.$areAnyLit$())$ cout $<<"$

ERROR $3$

$"$;

if $($p$.$isLit$("2"))$ cout $<<"$

ERROR $4$

$"$;

if $(!$p$.$isLit$("3"))$ cout $<<"$

ERROR $5$

$"$;

$\}$

This will be the first full and complete "building block" in our elevator simulation.

Here are some hints:

$1.$ In the stream insertion operator, use something like panel.buttons$[$i$].$isLit to access the $"$is it lit?" attribute Button at index i in the vector of Button objects owned by the parameter object $"$ panel $".$

$2.$ In the member functions, use an unsigned int in the for$-$loops that traverse the vector of buttons, like this: for $($unsigned int i $=0$; i $<$ host.buttons.size$()$; i$++).$

$3.$ In Panel::getFirstLit$(),$ traverse the vector of buttons, looking only at the lit ones. Find the one with the lowest sequence number and return its label. If none are lit, return a blank string.

Note $--$ there is no need for a stream insertion operator for the Button class.

Compile like this $($commend line statement$)$: you won't need it if the program running from the IDE but a driver program.

c$++-$std$=$c$++11\_$testPanel.cpp Panel.cpp $-$Wall

Submit the Panel.cpp and Panel.h$.$ DON'T submit $\_$testPanel.cpp

$**$ For this course, any user defined classes will have the header file $($classname$.$h$)$ includes the class declaration only and the source file $($classname$.$cpp$)$ includes the member function implementation only. There will be another $*.$cpp file as the driver program including the main$()$ function.

Panel class declaration $($Panel$.$h example$)$

class Panel

$\{$

struct Button

$\{$

string label;

bool lit;

int sequence;

static int count;

$\}$;

vector buttons;

public:

void addButton$($string$)$;

void press$($string$)$;

void clear$($string$)$;

string getFirstLit$()$ const;

bool isLit$($string$)$ const;

bool areAnyLit$()$ const;

friend ostream& operator$<<($ostream&$,$ const Panel&$)$;

$\}$;

Panel class member function implementations will be in the Panel.cpp

Include all three files $($Panel$.$h$,$ Panel.cpp and $\_$testPanel.cpp $)$ in the project and check if the outputs correct before submission. If there is any "ERROR" in the console output, make sure to correct your work before the submission.