Objective: Build a compiler for Jack -- a modern, object-based, Java-like language. The compiler construction spans two projects: 10 (Syntax Analysis) and 11 (Code Generation). In this project we build a syntax analyzer that parses programs according to the Jack grammar, producing an XML file that reflects the program's structure. Resources: The main tool in this project is the programming language in which you will implement the syntax analyzer. You will also need the TextComparer utility (available in your tools directory, assuming that you've installed the TECS software suite), which allows comparing the output files generated by your analyzer to the compare files supplied by us. You may also want to inspect the generated and supplied output files using an XML viewer (any standard web browser should do the job). All the test files necessary for this project are available in project 10.zip. Start by creating a directory named projects/10 on your computer, then extract this file into it (preserving the directory structure embedded in the zip file). files in the zip are:

main txt file:

// This file is part of the materials accompanying the book

// "The Elements of Computing Systems" by Nisan and Schocken,

// MIT Press. Book site: www.idc.ac.il/tecs

// File name: projects/10/ArrayTest/Main.jack

/** Computes the average of a sequence of integers. */

class Main {

function void main() {

var Array a;

var int length;

var int i, sum;

let length = Keyboard.readInt("HOW MANY NUMBERS? ");

let a = Array.new(length);

let i = 0;

while (i < length) {

let a[i] = Keyboard.readInt("ENTER THE NEXT NUMBER: ");

let i = i + 1;

}

let i = 0;

let sum = 0;

while (i < length) {

let sum = sum + a[i];

let i = i + 1;

}

do Output.printString("THE AVERAGE IS: ");

do Output.printInt(sum / length);

do Output.println();

return;

}

}

and the other one;

main T:

-

class

Main

{

function

void

main

(

)

{

var

Array

a

;

var

int

length

;

var

int

i

,

sum

;

let

length

=

Keyboard

.

readInt

(

HOW MANY NUMBERS?

)

;

let

a

=

Array

.

new

(

length

)

;

let

i

=

0

;

while

(

i

<

length

)

{

let

a

[

i

]

=

Keyboard

.

readInt

(

ENTER THE NEXT NUMBER:

)

;

let

i

=

i

+

1

;

}

let

i

=

0

;

let

sum

=

0

;

while

(

i

<

length

)

{

let

sum

=

sum

+

a

[

i

]

;

let

i

=

i

+

1

;

}

do

Output

.

printString

(

THE AVERAGE IS:

)

;

do

Output

.

printInt

(

sum

/

length

)

;

do

Output

.

println

(

)

;

return

;

}

}