I need description. Other wise I would downvote. Thank you Problem 2 (Declaration Order, Sec. 3.3.3, 20 pts):Consider the following pseudocode.1. procedure maina: integer : 1b: integer : 22.3.procedure middleb: integer :=a4.5.6.procedure inner7.print a, b8.a: integer := 3-- body of middleinnero9.10.11.print a, b12.-- body of mainmiddleo13.14.print a, bAs can be seen from the pseudocode, this is a language that allowsnested subroutines (middle is nested inside main and inner is nestedinside middle).a) Suppose that this is a language with the declaration order rules of alanguage like C, i.e. names must be declared before use, and the scope ofa name extends from its declaration through the end of the block.For each print statement (lines 7, 11, and 14), indicate whichdeclarations of a and b are in the referencing environment (i.e.what declarations are they referring to). The declarations arelines that have the assignment to the variable (':=').• What numbers are output by the program?b) Suppose that this is a language with the declaration order rules ofModula-3, i.e. names can be declared in any order, and their scope is theentire block in which they are declared (see 3rd paragraph in pg. 132 of4th edition or pg. 129 in 3rd edition of your textbook).• For each print statement (lines 7, 11, and 14), indicate whichdeclarations of a and b are in the referencing environment. Thedeclarations are lines that have the assignment to the variable(':=').• What numbers are output by the program?

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Engineering

Computer Engineering

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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Problem 2 (Declaration Order, Sec. 3.3.3, 20 pts):
Consider the following pseudocode.
1. procedure main
a: integer : 1
b: integer : 2
2.
3.
procedure middle
b: integer :=a
4.
5.
6.
procedure inner
7.
print a, b
8.
a: integer := 3
-- body of middle
innero
9.
10.
11.
print a, b
12.
-- body of main
middleo
13.
14.
print a, b
As can be seen from the pseudocode, this is a language that allows
nested subroutines (middle is nested inside main and inner is nested
inside middle).
a) Suppose that this is a language with the declaration order rules of a
language like C, i.e. names must be declared before use, and the scope of
a name extends from its declaration through the end of the block.
For each print statement (lines 7, 11, and 14), indicate which
declarations of a and b are in the referencing environment (i.e.
what declarations are they referring to). The declarations are
lines that have the assignment to the variable (':=').
• What numbers are output by the program?
b) Suppose that this is a language with the declaration order rules of
Modula-3, i.e. names can be declared in any order, and their scope is the
entire block in which they are declared (see 3rd paragraph in pg. 132 of
4th edition or pg. 129 in 3rd edition of your textbook).
• For each print statement (lines 7, 11, and 14), indicate which
declarations of a and b are in the referencing environment. The
declarations are lines that have the assignment to the variable
(':=').
• What numbers are output by the program?

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