Language$/$Type:C$++$ inheritance polymorphism

Consider the following classes; assume that each is defined in its own file.

class Hamburger : public Bacon $\{$

public:

virtual void m$2()\{$

cout H $2"$ endl;

Bacon::m$2()$;

$\}$

$$

virtual void m$4()\{$

cout H $4"$ endl;

$\}$

$\}$;

$$

class Mayo : public Hamburger $\{$

public:

virtual void m$3()\{$

cout M $3"$ endl;

m$1()$;

$\}$

$$

virtual void m$4()\{$

cout M $4"$ endl;

$\}$

$\}$;

$$

class Lettuce $\{$

public:

virtual void m$1()\{$

cout L $1"$ endl;

m$2()$;

$\}$

$$

virtual void m$2()\{$

cout L $2"$ endl;

$\}$

$\}$;

$$

class Bacon : public Lettuce $\{$

public:

virtual void m$1()\{$

Lettuce::m$1()$;

cout B $1"$ endl;

$\}$

$$

virtual void m$3()\{$

cout B $3"$ endl;

$\}$

$\}$;

Now assume that the following variables are defined:

Lettuce$*$ var$1=$ new Bacon$()$;

Bacon$*$ var$2=$ new Mayo$()$;

Lettuce$*$ var$3=$ new Hamburger$()$;

Bacon$*$ var$4=$ new Hamburger$()$;

Lettuce$*$ var$5=$ new Lettuce$()$;

In the table below, indicate in the right$-$hand column the output produced by the statement in the left$-$hand column. If the statement produces more than one line of output, indicate the line breaks with slashes as in $"$x $/$ y $/$ z$"$ to indicate three lines of output with $"$x$"$ followed by $"$y$"$ followed by $"$z$".$ If the statement does not compile, write "COMPILER ERROR". If a statement would crash at runtime or cause unpredictable behavior, write "CRASH".You passed $15$ of $18$ tests. Try again.

$\backslash$table$[[$#$,$question,your answer,result$],[1,$var$1->$m$1(),$L$1/$L$2/$B$1,$pass$],[2,$var$1->$m$2()$;$,$L$2,$pass$],[3,$var$1->$m$3(),$COMPILER ERROR,pass$],[4,$var$2->$m$1(),$M $4/$L$1/$L$2,$ox fail$],[5,$var$2->$m$2(),$H$2/$L$2,$pass$],[6,$var$2->$m$3(),$M $4/$L$1/$L$2,$ox fail$],[7,$var$2->$m$4(),$COMPILER ERROR,pass$],[8,$var$3->$m$1(),$M $4/$L$1/$L$2,$x fail$],[9,$var$3->$m$2(),$H$2/$L$2,$pass$],[10,$var$4->$m$2(),$H $2/$ L $2,$pass$],[11,$var$4->$m$3(),$B $3,$pass$],[12,$var$4->$m$4(),$COMPILER ERROR,pass$],[13,(($ Bacon$*)$ var $1)->$m$1()$;$,$L$1/$L$2/$B$1,$pass$],[14,(($ Bacon$*)$ var$1)->$m$3()$;$,$B $3,$pass$],[15,(($ Mayo$*)$ var$5)->$m$3()$;$,$CRASH,pass$],[16,(($Lettuce$*)$ var$4)->$m$3()$;$,$COMPILER ERROR,pass$],[17,(($ Hamburger$*)$var$2)->$m$4()$;$,$M $4,$pass$],[18,(($ Mayo$*)$var$2)->$m$4(),$M $4,$pass$]]$