Interpreter

Start of Interpreter for program ext1.tri at Sun Dec 12 23:10:57 2010
Program
# ARRAY a[4]
a[0]:=1
a[1]:=2
a[2]:=3
a[3]:=((a[0]+a[1])+a[2])#
Parsing tree
root
ARRAY
a 4
[]:=
a 0 1
[]:=
a 1 2
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2
Table of constants
c1=4 c2=0 c3=1 c4=2 c5=3
Table of identifiers
i1=a

Modified tree
root
ARRAY
a 4
[]:=
a 0 1
[]:=
a 1 2
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Stack id a=0

Stack id a=0 const=4
interpreting the operator ARRAY a[4]
ARRAY
a 4
[]:=
a 0 1
[]:=
a 1 2
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Created new array a
a 0 0 0 0

Stack

Stack id a=0

Stack id a=0 const=0

Stack id a=0 const=0 const=1
interpreting the operator a[0]:=1
[]:=
a 0 1
[]:=
a 1 2
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Writed value 1 to a[0]
a 1 0 0 0

Stack

Stack id a=0

Stack id a=0 const=1

Stack id a=0 const=1 const=2
interpreting the operator a[1]:=2
[]:=
a 1 2
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Writed value 2 to a[1]
a 1 2 0 0

Stack

Stack id a=0

Stack id a=0 const=2

Stack id a=0 const=2 const=3
interpreting the operator a[2]:=3
[]:=
a 2 3
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Writed value 3 to a[2]
a 1 2 3 0

Stack

Stack id a=0

Stack id a=0 const=3

Stack id a=0 const=3 id a=0

Stack id a=0 const=3 id a=0 const=0
interpreting the operator a[0]
->
a 0
->
a 1
a[0]=1
Stack id a=0 const=3 tm=1

Stack id a=0 const=3 tm=1 id a=0

Stack id a=0 const=3 tm=1 id a=0 const=1
interpreting the operator a[1]
->
a 1
a[1]=2
Stack id a=0 const=3 tm=1 tm=2
interpreting the operator (a[0]+a[1])
+
->
a 0
->
a 1
->
a 2

3 = 1 + 2

Stack id a=0 const=3 tm=3

Stack id a=0 const=3 tm=3 id a=0

Stack id a=0 const=3 tm=3 id a=0 const=2
interpreting the operator a[2]
->
a 2
a[2]=3
Stack id a=0 const=3 tm=3 tm=3
interpreting the operator ((a[0]+a[1])+a[2])
+
+
->
a 0
->
a 1
->
a 2

6 = 3 + 3

Stack id a=0 const=3 tm=6
interpreting the operator a[3]:=((a[0]+a[1])+a[2])
[]:=
a 3 +
+
->
a 0
->
a 1
->
a 2

Writed value 6 to a[3]
a 1 2 3 6

Stack
program ext1.tri is completed
THE VARIABLES:
a=0
ARRAYS:
a 1 2 3 6
Interpreter ended at Sun Dec 12 23:10:57 2010