Add complete assignment description and testing code.

example_output/p1.out

@@ -0,0 +1,50 @@
+IDENTIFIER	r
+ASSIGN		=
+FLOAT		8
+NEWLINE
+IDENTIFIER	pi
+ASSIGN		=
+FLOAT		3.1415
+NEWLINE
+IDENTIFIER	circle_area
+ASSIGN		=
+IDENTIFIER	pi
+TIMES		*
+IDENTIFIER	r
+TIMES		*
+IDENTIFIER	r
+NEWLINE
+IDENTIFIER	circle_circum
+ASSIGN		=
+IDENTIFIER	pi
+TIMES		*
+INTEGER		2
+TIMES		*
+IDENTIFIER	r
+NEWLINE
+IDENTIFIER	sphere_vol
+ASSIGN		=
+LPAREN		(
+FLOAT		4
+DIVIDEDBY	/
+FLOAT		3
+RPAREN		)
+TIMES		*
+IDENTIFIER	pi
+TIMES		*
+IDENTIFIER	r
+TIMES		*
+IDENTIFIER	r
+TIMES		*
+IDENTIFIER	r
+NEWLINE
+IDENTIFIER	sphere_surf_area
+ASSIGN		=
+INTEGER		4
+TIMES		*
+IDENTIFIER	pi
+TIMES		*
+IDENTIFIER	r
+TIMES		*
+IDENTIFIER	r
+NEWLINE

example_output/p2.out

@@ -0,0 +1,65 @@
+IDENTIFIER	a
+ASSIGN		=
+BOOLEAN		1
+NEWLINE
+IDENTIFIER	b
+ASSIGN		=
+BOOLEAN		0
+NEWLINE
+IDENTIFIER	x
+ASSIGN		=
+INTEGER		7
+NEWLINE
+IF		if
+IDENTIFIER	a
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	x
+ASSIGN		=
+INTEGER		5
+NEWLINE
+IF		if
+IDENTIFIER	b
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	y
+ASSIGN		=
+INTEGER		4
+NEWLINE
+DEDENT
+ELSE		else
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	y
+ASSIGN		=
+INTEGER		2
+NEWLINE
+DEDENT
+DEDENT
+IDENTIFIER	z
+ASSIGN		=
+LPAREN		(
+IDENTIFIER	x
+TIMES		*
+INTEGER		3
+TIMES		*
+INTEGER		7
+RPAREN		)
+DIVIDEDBY	/
+IDENTIFIER	y
+NEWLINE
+IF		if
+IDENTIFIER	z
+GT		>
+INTEGER		10
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	y
+ASSIGN		=
+INTEGER		5
+NEWLINE
+DEDENT

example_output/p3.out

@@ -0,0 +1,52 @@
+DEF		def
+IDENTIFIER	foo
+LPAREN		(
+IDENTIFIER	a
+COMMA		,
+IDENTIFIER	b
+COMMA		,
+IDENTIFIER	c
+RPAREN		)
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	x
+ASSIGN		=
+IDENTIFIER	a
+TIMES		*
+IDENTIFIER	b
+NEWLINE
+IDENTIFIER	y
+ASSIGN		=
+IDENTIFIER	x
+DIVIDEDBY	/
+IDENTIFIER	c
+NEWLINE
+IDENTIFIER	z
+ASSIGN		=
+IDENTIFIER	y
+TIMES		*
+IDENTIFIER	y
+NEWLINE
+RETURN		return
+IDENTIFIER	z
+NEWLINE
+DEDENT
+IDENTIFIER	foo
+LPAREN		(
+INTEGER		1
+COMMA		,
+INTEGER		2
+COMMA		,
+INTEGER		3
+RPAREN		)
+NEWLINE
+IDENTIFIER	foo
+LPAREN		(
+FLOAT		1
+COMMA		,
+FLOAT		2
+COMMA		,
+FLOAT		3
+RPAREN		)
+NEWLINE

example_output/p4.out

@@ -0,0 +1,82 @@
+DEF		def
+IDENTIFIER	fib
+LPAREN		(
+IDENTIFIER	n
+RPAREN		)
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	f0
+ASSIGN		=
+INTEGER		0
+NEWLINE
+IDENTIFIER	f1
+ASSIGN		=
+INTEGER		1
+NEWLINE
+IDENTIFIER	i
+ASSIGN		=
+INTEGER		0
+NEWLINE
+WHILE		while
+IDENTIFIER	i
+LT		<
+IDENTIFIER	n
+COLON		:
+NEWLINE
+INDENT
+IDENTIFIER	fi
+ASSIGN		=
+IDENTIFIER	f0
+PLUS		+
+IDENTIFIER	f1
+NEWLINE
+IDENTIFIER	f0
+ASSIGN		=
+IDENTIFIER	f1
+NEWLINE
+IDENTIFIER	f1
+ASSIGN		=
+IDENTIFIER	fi
+NEWLINE
+IDENTIFIER	i
+ASSIGN		=
+IDENTIFIER	i
+PLUS		+
+INTEGER		1
+NEWLINE
+DEDENT
+RETURN		return
+IDENTIFIER	f0
+NEWLINE
+DEDENT
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		0
+RPAREN		)
+NEWLINE
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		1
+RPAREN		)
+NEWLINE
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		2
+RPAREN		)
+NEWLINE
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		3
+RPAREN		)
+NEWLINE
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		4
+RPAREN		)
+NEWLINE
+IDENTIFIER	fib
+LPAREN		(
+INTEGER		5
+RPAREN		)
+NEWLINE