# MATLAB - Cryptosum Solver

Bütçe $30-100 USD

We need a matlab program capable of reading a text file containing a cryptosum puzzle and solving it using matrices and perms function in MATLAB, to give the unique solution and how many attempts were made to reach the solution.

## Deliverables

Cryptosum is a numeric puzzle. I need a computer program using Matlab which solves these puzzles. The program should be

automatic; once all the information describing the puzzle is read by your program it should find the

solution without any further intervention from the user.

The puzzle consists of a 4x4 matrix of exotic symbols (shown as Letters below)

Each of the symbols is uniquely associated with an integer

in the range 1 to 9. The sum of the symbols within each

row and column is provided along the right and bottom

edges of the puzzle. To solve the puzzle, determine the

values of each of the symbols then sum the diagonal

symbols to provide a single total which is written at the

bottom right (replacing the question mark). This is the

solution to the puzzle.

![][1]

EXAMPLE OF A CRYPTOSUM

A B C D 10

E F G H 28

D I H F 22

B C I A 15

18 16 22 19 ?

Software Requirements:

1. The program should be able to read a puzzle (as described above) directly from a text file. The

format of the text file should indentical to that described in Hint 2 above. It consists of five lines,

each consisting of five symbols or numbers. The symbols and numbers within each line are

seperated by multiple spaces. Each of the values should be strictly validated to ensure that the file

is correct and appropriate error messages generated if any fault is found.

[url removed, login to view] the program starts it should ask for the name of the file to process on the console.

3. On completion the program must display a valid solution to the puzzle and also the values for

each of the nine symbols that comprise the 4x4 matrix. If the puzzle has no solution then your

program should indicate this in some appropriate way. For the puzzle described above the solution

should be displayed to the console as follows:

A=4 B=3 C=1 D=2 10

E=9 F=5 G=6 H=8 28

D=2 I=7 H=8 F=5 22

B=3 C=1 I=7 A=4 15

18 16 22 19 ?=21

![][2]

The results should also be stored as a text file to provide a permanent record of the solution.

4. On completion the program should also display the number of invalid solutions that were tested

prior to finding the correct solution and the time that the program took to find a solution in

milliseconds.

5. The code should be amply documented internally and also broken up into functions whenever

appropriate. When functions are created they should be documented for use within the Matlab help

system.

6. You should write a design and testing log report describing the design decisions you made as you

developed the program and the test strategy you applied to ensure that the code worked as expected

(no more than 5 pages). This can be used to document the design meetings you have with your

group partner, the software structure and sub-systems that you need to develop, the functions that

will be used to implement these subsystems, the approach for testing each of these functions and the final tests that were applied.

7. Finally write a brief user manual describing to a new user how to operate your program. You

may assume that your users already understand the crytosum puzzle (no more than 2 pages).

Describe the restrictions to the input file format, how to interpret the output messages, the error

messages that your software can generate and what they mean.

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