In: Computer Science
Write a Java program called Numbers that reads a file containing a list of numbers and outputs, for each number in the list, the next bigger number. For example, if the list is
78, 22, 56, 99, 12, 14, 17, 15, 1, 144, 37, 23, 47, 88, 3, 19
the output should look like the following:
78: 88
22: 23
56: 78
99: 144
12: 14
14: 15
17: 19
15: 17
1: 3
144: 2147483647
37: 47
23: 37
47: 56
88: 99
3: 12
19: 22
NOTE: If there is no bigger number in the sequence, just display the value of Integer.MAX_VALUE .
The output should be shown on the screen and also saved in a file.
Program Design
Additional Requirements
The output of your program should exactly match the sample program output given at the end
In: Computer Science
(10) Let L = { <D> | D is a DFA that accepts sR whenever it accepts s } . Show that L is Turing-decidable.
In: Computer Science
Discussion Topics:
Assume that you have a Saudi league player database. In this
database, you have a table containing players’ attributes such as
(Name, age, position, etc.) and you decided to add information
about players’ agents. Would you represent the agent information as
attributes in the player table or would you create an entity set
for players’ agents? Justify your answer.
Note: Provide answers in your own words.
In: Computer Science
Consider a file with a large number of Person(id, name, birth-date) records. Assume that users frequently search this file based on a the field id to find the values of name or birthdate for people whose information is stored in the file. Moreover, assume that users rarely update current records or insert new records to the file. Which file structure, heap versus sorted, provides the fastest total running time for users’ queries over this file? Explain your answer.
In: Computer Science
In matlab:
Write a Bisection method with a while-loop that
finds the root of the function f(x) = e^(−x) −x^2 + 2 between the
values of [−5,5]. Write the function f(x) as a function file (a
separate .m file). Use the error tolerance level of “tol = 1e-8.”
Save the solved root value in the file A4.dat.
In: Computer Science
Write a program that prompts the user to enter five test scores and then print the average test score to the screen. (Assume that the test scores are decimal numbers). Use the following 5 numbers: 10.5 5.5 20.0 10.0 5.5.
I am having trouble understanding where the 5 values are entered in the program.
The program has been provided:
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double testScore1;
double testScore2;
double testScore3;
double testScore4;
double testScore5;
cout << "Enter
test score 1: ";
cin >>
testScore1;
cout <<
endl;
cout << "Enter
test score 2: ";
cin >>
testScore2;
cout <<
endl;
cout << "Enter
test score 3: ";
cin >>
testScore3;
cout <<
endl;
cout << "Enter
test score 4: ";
cin >>
testScore4;
cout <<
endl;
cout << "Enter
test score 5: ";
cin >>
testScore5;
cout <<
endl;
cout << "Average
test score: " <<
(testScore1+testScore2+testScore3+testScore4+testScore5)/5 <<
endl;
cout <<
endl;
// when using Visual
Studio, use the system/pause command to display the results of your
program
// system("pause");
return 0;
}
In: Computer Science
Book Review: How America Lost Its Secrets?
In: Computer Science
NOTE: Write your program in 8086 language. Preferably, I'd like you to use emu8086, but you can use any 8086 program and write and test them.
Program: Write a program to do the following.
(a) Scroll a window from row 5, column 10 to row 20, column 70, with a reverse video attribute.
(b) Locate the cursor at row 10, column 20.
(c) Display a line of text, such as,
THIS TEXT IS IN THE WINDOW
(d) After the line of text is displayed, wait for a key to be pressed.
(e) Scroll a window from row 7, column 12 to row 18, column 68, with a normal attribute.
(f) Write a character A with a blinking attribute in the middle of the window.
(g) Wait for a key stroke, and then clear entire screen with a normal attribute.
In: Computer Science
I want to take COMPTIA SECURITY+ EXAMS.
ANY RELIABLE DUMPS RESOURCE THAT GUARANTEE A 100% PASS ?
In: Computer Science
Use C++ for this program
Define a Line Class.
Constraint: Line must be in First Quadrant
for X-Y Coordinate System.
Create the following methods:
1) Parameterized Constructor
2) Horizontal Line Constructor
3) Vertical Line Constructor
4) Default Constructor
5) Compute Length of Line.
TEST CASES: Find Length of Line
(a) Point 1: (5,6) Point 2: (15,6)
(b) Point 1: (7,8) Point 2: (7,20)
(c) Point 1: (9,10) Point 2: (19,20)
(d) Default Line of 10 units at (0,0).
A quick question, would this be put in a header file and called into a source file?
In: Computer Science
Given an original message, determine the cipher that will produce the encoded string that comes earliest alphabetically. Return this encoded string. In the example below, the second cipher produces the alphabetically earliest encoded string ("abccd").
For example, if John's message is "hello" and his cipher maps 'h' to 'd', 'e' to 'i', 'l' to 'p' and 'o' to 'y', the encoded message will be "dippy". If the cipher maps 'h' to 'a', 'e' to 'b', 'l' to 'c' and 'o' to 'd', then the encoded message will be "abccd".
My code (bolded code is part of the question and cannot be changed):
string encrypt(string message){
// you write code here
string unEncryp;
for(int i = 0; i < message.length()){
char temp = message[i];
switch(temp){
default:
break;
}
}
return unEncryp;
}
In: Computer Science
For the past several weeks you have addressed several different areas of telecommunications and information technology in relation to different types of communication across the organizational footprint of Sunshine Health Corporation. Review the work you have done and formulate the Network Security Plan to be implemented across the network footprint. This is not to be an overly detailed report but to address different network concerns and recommendations for improving and securing organizational data, personnel records, intellectual property, and customer records.
Please address the narrative plan as well as a network diagram (no IP addresses, or circuit data required) and what is being done to secure the network at different levels of the OSI model and the organizational structure. Please make sure that you bring in a minimum of two external sources to strengthen and support your presentation.
The assignment should be 5-6 pages of content not counting title page, reference page or appendices (diagrams, budget sheet, equipment list, etc.). Please follow APA format.
In: Computer Science
Suppose your architectural/design style for the human resource management scenario is MVC, what would be the best architectural evaluation technique to ensure that your choice of the selected architectural/design style is correct? Describe your answer with justification.
In: Computer Science
Your goal for this assignment is to create a tool that manages an equivalence relation that can be changed in a specific way by the program while the program runs. The assignment will involve creating two files, equiv.h and equiv.cpp.
For this assignment, the equivalence relation is always over a set of integers {1, 2, 3, …, n} for some positive integer n.
This tool is not a complete program. It is intended to be part of a larger program. File equiv.cpp must not contain a 'main' function.
Equiv.h will contain function prototypes, but it must not contain any full function definitions. (There must be no function bodies.) Equiv.cpp must contain line
#include "equiv.h"
before any function definitions.
Interface
The interface tells exactly what this module provides for other modules to use. Other modules must not use anything that is not described here. Briefly, the interface includes a type, ER, which is the type of an equivalence relation, and the following functions.
ER newER(const int n); void destroyER(ER R); bool equivalent(ER R, const int x, const int y); void merge(ER R, const int x, const int y);
Additionally, there is one function that is solely for debugging.
void showER(const ER R, const int n);
There is one more function that is part of the implementation but not part of the interface. You can use it for debugging, though.
int leader(ER R, const int x);
A module that uses this tool can create an equivalence relation called R by saying
ER R = newER(n);
where n is a positive integer. Initially, each number is in its own equivalence class; the equivalence classes are {1}, {2}, …, {n}. There are two operations that can be performed.
equivalent(R, x, y) returns a boolean value: true if x and y are currently in the same equivalence class in equivalence relation R, and false otherwise.
merge(R, x, y) modifies equivalence relation R by making x and y equivalent. It combines the equivalence class that contains x with the equivalence class that contains y. The merge function does not return an answer.
Example
For example, suppose that n = 7. The following shows a sequence of operations and shows the equivalence classes after each merge operation.
| Step | Result |
|---|---|
| ER R = newER(7) | R = {1} {2} {3} {4} {5} {6} {7} |
| merge(R, 1, 5) | R = {1, 5} {2} {3} {4} {6} {7} |
| merge(R, 2, 7) | R = {1, 5} {2, 7} {3} {4} {6} |
| equivalent(R, 1, 5) | yields true |
| equivalent(R, 1, 7) | yields false |
| merge(R, 5, 7) | R = {1, 2, 5, 7} {3} {4} {6} |
| equivalent(R, 2, 5) | yields true |
| equivalent(R, 2, 3) yields false | yields false |
| merge(R, 2, 3) | R = {1, 2, 3, 5, 7} {4} {6} |
| equivalent(R, 3, 7) | yields true |
| equivalent(R, 4, 7) | yields false |
| merge(R, 4, 6) | R = {1, 2, 3, 5, 7} {4, 6} |
| merge(R, 2, 3) | R = {1, 2, 3, 5, 7} {4, 6} |
As you can see from the last step, it is allowed to merge two values that are already equivalent. That should cause no change.
An Algorithm for Managing an Equivalence Relation
You will not store the equivalence classes directly. Instead, you will store them implicitly, using the following ideas. You are required to implement an equivalence manager in this way. You will receive no credit for a module that does not follow this algorithm.
Each equivalence class has a leader, which is one of the members of that equivalence class. You will create a function leader(R, x) that returns the current leader of the equivalence class that contains x in equivalence relation R.
Two values are equivalent if they have the same leader.
There is another idea that is similar to a leader, but not exactly the same. Each value has a boss, which is a value in its equivalence class. For the purposes of describing the idea, let's write boss[x] for x's boss.
If x is the leader of its equivalence class then boss[x] = 0, indicating that x has no boss.
If x is not the leader of its equivalence class then boss[x] ≠ 0 and boss[x] is closer to the leader, in the following sense. If you look at the values x, boss[x], boss[boss[x]], boss[boss[boss[x]]], … then you will eventually encounter x's leader (just before you encounter 0).
Details on the algorithm
Use an array to store the bosses. Declaration
typedef int* ER;
defines type ER to be the same as int*. Write the following functions.
newER(n) returns an equivalence relation as an array of n+1 integers. Allocate the array in the heap. This array will be used to store the bosses. If R has type ER then R[x] is x's boss.
In C++, arrays start at index 0. You will use indices 1, … n, so you need to allocate n+1 slots. (Index 0 will not be used.)
Initialize the array so that each value is a leader of its own equivalence class. That is, R[x] = 0 for x = 1, …, n.
leader(R, x) returns the leader of x in equivalence relation R. To compute x's leader, just follow the bosses up to the leader. Here is a sketch of a loop that finds the leader of x.
y = x
while(boss[y] != 0)
y = boss[y]
return y
You can use a loop or recursion the leader function. Any
function that wants to compute a leader must use the leader
function to do that.equivalent(R, x, y) returns true if x and y have the same leader in R. Notice that is not the same as saying that they have the same boss.
merge(R, x, y) merges the equivalence classes of x and y in R as follows. First, it finds the leaders x′ and y′ of x and y. If x′ and y′ are different (so x and y are not already in the same equivalence class) then y′ becomes the new boss of x′ and y′ becomes the leader of the combined equivalence class.
destroyER(R) deallocates R.
showER(R, n) prints the entire contents of array R (of size n) in a readable form for debugging. Be sure that showER shows both k and k's boss, for each k.
Do not try to be too fancy here. Do not try to show the equivalence classes. ShowER is a debugging tool, and it should show the bosses.
| Important Note. |
|---|
|
It is crucial for your merge function never to change the boss of a nonleader. If you are not sure that x is a leader, do not change R[x]. Pay attention to this! In the past, many students have ignored this requirement. Needless to say, their modules did not work and their scores were low. |
Additional Requirements
It is important for you to follow the algorithms and design described here. Do not make up your own algorithm. Implement exactly the functions that are indicated. Keep the parameter order as shown here. If you change the parameter order, your module will not compile correctly with my tester. Do not add extra responsibilities to functions.
The definition of ER must only be in equiv.h. Do not duplicate that definition in equiv.cpp.
A Refinement Plan
| Development plan | |
|---|---|
|
2. Create a file called equiv.cpp. Copy and paste the module-template into it. Edit the file. Add your name and the assignment number. If you will use tabs, say how far apart the tab stops are. Add line #include "equiv.h" |
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3. Write a comment telling what this module will provide when it is finished. Equiv.cpp is not an application. It just provides a tool. Say that it is an equivalence relation manager and give an outline of the interface. |
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4. Create a file called equiv.h. Copy the following into equiv.h, then edit it to add your name.
Note. In the types of equivalent and leader, parameter R is not marked const, even though it seems to make sense to do that. The reason is that improvements that can be done for extra credit need to make changes to R, even in equivalent and leader. |
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5. In equiv.cpp, write a heading and contract, then fill in the body, of the 'newER' function. Notice that newER(n) returns an equivalence relation that can handle set {1, 2, …, n}. Say that. Don't say that it returns an array. Where possible, express things in conceptual terms rather than in physical terms. |
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6. In equiv.cpp, write a contract, then an implementation, of the 'showER' function. Pay attention to what showER is supposed to do. |
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7. Create file test1.cpp for partial testing of equiv.cpp. Add a main function to test1.cpp and make main create a new ER object (using newER) and use showER to show what it looks like. Testequiv.cpp should contain #include "equiv.h"to allow it to use what is described in equiv.h. Compile test1.cpp and equiv.cpp together as follows. g++ -Wall -o test1 test1.cpp equiv.cppThen run test1 by ./test1 |
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8. In equiv.cpp, write a heading and contract, then an implementation, of the 'leader' function. Modify test1.cpp so that it tests leader by showing showing the leader of each value in the ER object that it creates. Note that, at this point, each number will be its own leader. Run test1.cpp. |
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9. In equiv.cpp, write a heading and contract, then an implementation, of the 'merge' function. Modify test1.cpp by making it merge just a few values, then show what the equivalence relation looks like using showER. Does it look right? |
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10. In equiv.cpp, write a contract, then an implementation, of the 'equivalent' function. Now you have enough to use the automated tester. Run it. If there are errors, fix them. You can read testequiv.cpp to see what it is doing, but only change equiv.cpp to fix errors; changing the tester will not help since I will not use your modified tester when I grade your submission. |
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11. In equiv.cpp, write a contract, then an implementation, of the 'destroyER' function. |
In: Computer Science