代写CS253 HW7程序、代做C++代写程序、data留学生编程代写

日期：2020-12-08 11:39

CS253 HW7: Life in Jail

Changes

Updates to the assignment will be noted here. None yet!

Description

HW7 has all the same requirements & restrictions as HW6, with the addition

of a single method.

Methods

Rule must have the following additional public method:

.jail(string jail-program)

If this method is called, then instead of using Conway’s rule from HW2, or a Golly rule from HW4,

use the jail-program to evaluate whether or not a cell lives or dies when .eval() is called.

The Jail program will expect nine arguments, which will be placed in the variables A…I, that indicate

the immediate neighboorhood of the cell in question, including the cell itself. Each argument will be

0 if the cell is dead, and 1 if the cell is alive. The program must return 0 if the cell should be dead in

the next generation, and 1 if it should be alive.

The nine arguments represent the adjacent cells and the cell itself, and correspond to the nine

arguments to Rule::eval(), like this:

nw n ne

w me e

sw s se

or

A B C

D E F

G H I

That is, E is the cell in question. D is its neighbor to the left, H is its neighbor below, and so on.

If there are any bad tokens in the Jail program, throw a runtime_error when Rule::jail() is

called. As in HW5, other errors (mismatched if/fi, if a b <, etc.) must result in a thrown

runtime_error, either when Rule::jail() is called, or when the program is actually executed

via Rule::eval().

The Jail program is not executed when Rule::jail() is called. Rule::jail() performs lexical

analysis on the Jail program, and remembers it. Later, when Rule::eval() is called, the Jail

program is executed (interpreted). Of course, for any Board, computing the next generation will

require calling Rule::eval() many times, once for each cell.

It is valid to call Rule::conway(), Rule::golly(), or Rule::jail() in any combination,

several times. The last call determines the future behavior of Rule::eval().

Sample Run

Here is a sample run,

where % is my shell

prompt:

2020/11/29 CS253 | Main / HW7

https://cs.colostate.edu/~cs253/Fall20/HW7 2/3

% cmake .

r.jail(R"(# Conway’s rule in JAIL

# A B C

# D E F

# G H I

# Accumulate count in C:

c += a c += b c += d c += f

c += g c += h c += i

if C = 2 return E fi # Two neighbors means survive

if C = 3 return 1 fi # Three neighbors mean born or survive

return 0 # Death otherwise

)");

Board b("blinker", r);

cout << b << '\n';

for (int i=0; i<3; i++)

cout << ++b << '\n';

r.jail("return a # move down to the right");

Board b3("block3", '*', '\'', r);

cout << b3 << '\n';

for (int i=0; i<3; i++)

cout << ++b3 << '\n';

}

Tar le

The tar le

for this assignment must be called: hw7.tar

It must contain:

source les

(*.cc), including Board.cc & Rule.cc

header les

(*.h), including Board.h & Rule.h

CMakeLists.txt, which will create the library le

libhw7.a.

These commands must produce the library libhw7.a:

cmake . && make

Your CMakeLists.txt must use at least -Wall when compiling.

How to submit your work:

In Canvas, check in the le

hw7.tar to the assignment “HW7”.

How to receive negative points:

Turn in someone else’s work.