Write the C or C++ program system2 that reads, when being executed, OS commands via the "command line parameter" C/C++ feature, and then executes them. Thecommand line parameters must be legal Unix/Linux commands. Print the number of commands entered. To prepare, read about argc, argv, and envp. Focus is only argc andargv. A sample execution by fictitious user "mike" is:herb$ ./a.out pwd ls whoamiargc4pwdargv[1]Executing command/Users/mikey'pwd'= lsargv[2]Executing command 'ls'ApplicationsContactsMusicPicturesfamilieherbDownloadstestlFavoritesLibraryMoviestestl.cpix_low_2020 test2test2.cDesktopPublicDocumentsa.outtest.cargv[3] = whoamiExecuting commandmikey'whoami'

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Answered: Write the C or C++ program system2 that…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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A declared name is only valid within a region of code known as the name's scope. Example: A variable “globalVar_1” declared in main() is only valid within main(), from the declaration to main()'s end. True or false
Assign interestPointer with the address of the higher interest. If the interests are the same, then assign interestPointer with nullptr. Ex: If the input is 497 261, then the output is: 497 is the higher interest. #include <iostream>using namespace std; int main() { int interest1; int interest2; int* interestPointer; cin >> interest1; cin >> interest2; /* Your code goes here */ if (interestPointer == nullptr) { cout << "The interests are the same." << endl; } else { cout << *interestPointer << " is the higher interest." << endl; } return 0;}
Write two c++ programs to implement a distributed version of a multithreaded Huffman decompressor using the one in project 1 The server program The user will execute this program using the following syntax: ./exec_filename port_no < input_filename where exec_filename is the name of your executable file, port_no is the port number to create the socket, and input_filename is the name of the file with the alphabet's information. The port number will be available to the server program as a command-line argument. The server program receives from STDIN the alphabet's information (using input redirection). The input file has multiple lines, where each line contains information (character and frequency) about a symbol from the alphabet. The input file format is as follows: A char representing the symbol. An integer representing the frequency of the symbol. Example Input File: E 3 G 3 F 1 H 2 Given the previous input file, the expected output for the server program is: Symbol: C,…
Could you help me with this one too, please Regex, APIs, BeautifulSoup: python import requests, refrom pprint import pprintfrom bs4 import BeautifulSoup complete the missing bodies of the functions below: def group_chat(text_message, friend):"""Question 2- Your friends are blowing up your group chat. Given a string of text messagesfrom your friends and a specific friend's name, return the first text messagethey sent, excluding their name.- Each text message ends with either a ?, !, or .- Your code must be written in one line. Args:text_message (astr)friend (astr)Returns:str of first match>>> text_message = "Madison: How are you guys going today?" + \"Anna: I'm doing pretty well!" + \"Madison: That's good to hear. How is everyone else?">>> friend = "Madison">>>group_chat(text_message, friend)How are you guys going today?"""pass test code: # text_message = "Madison: How are you guys going today?" + \# "Anna: I'm doing pretty well!" + \#…
The downloads include a python starter program (P9HashTable1.py) that reads an employee file, sets upthe data structures and then allows the user to search, add or delete employees from the database. Youmust store the employee file (EmployeeDB.csv) in the same folder as your python program. The pythonstarter program has some missing functions that you must provideThe deliverables this week are:1. A search function that will find an employee record based on the employee ID.• Use a hash function Mod(12) to convert empID to a position in the Hash Dictionary• Using the beginChain value in the Hash Dictionary, traverse the Employee linked list2. An insert function that will add a new employee to the database.• Check to see if this is the first node of the chain and process differently if it is3. A delete function that will remove an employee from the database.• You’re not physically removing the employee record, you’re just using the ptr to passover records that are deleted.4. After a…
The Cupid matchmaking Service maintains two files - one for the male clients and another for female clients. Each file contains a client ID, last name, first name, and address. Each file is in client ID order. Use the provided pseudocode to write a C++ application that merges the two files into one file containing a list of all clients, maintaining ID member order. // Pseudocode Project8// Start// Declarations// InputFile inFile1;// InputFile inFile2;// OutputFile outFile1;// num mClientNumber, fClientNumber// string mClientName, fClientName// bool atLeastOneFileNotAtEnd = true// bool inFile1Written = false// bool inFile2Written = false// output "File merge processing starting"// open inFile1 "MaleClients.rtf"// open inFile2 "FemaleClients.rtf"// open outFile1 "MergedClients.rtf"// read mClientNumber and mClientName from inFile1// read fClientNumber and fClientName from inFile2// while ( atLeastOneFileNotAtEnd == true )// if (inFile1 is EOF)// if (inFile2Written == false)// output…
ABC Bank needs to store the information of all the users. For a user, the information that the bank holds is the user's name, username, password, contact number. Read this data from the console and store it in a file named "example.txt". Write a C++ program to read inputs from the console and write the user details into a file as the comma-separated values. Strictly adhere to the Object-Oriented specifications given in the problem statement. All class names, member variable names, and function names should be the same as specified in the problem statement. File names used should be the same as mentioned in the problem description. The class named User has the following private member variables Data typeVariable namestringnamestringusernamestringpasswordstringcontactnumber Define the following member function in the class UserBO. Method nameDescription void writeUserdetails(ofstream &file,User obj)…
In Java C++Write a code assessing a txt file consisting of id numbers. It should asses the given id numbers if its valid. An ID number can be considered valid given below. The following numbers are (imagine that the numbers are in a txt file)12034562120238471204562312067282120371891293042812047281129374911283920112013818It must be divisible by 11 given the formula below.The output will be the number of valid and invalid numbers. 11191031 = 1*8 + 1*7 + 1*6 + 9*5 + 1*4 + 0*3 + 3*2 + 1*1 = 77sum of the products must be divisible by 11 for it to be valid.
Question: The overall grade in a course is determined from the grades of 3 midterms and a final exam, using the following scheme: Midterms: Midterms are graded on a scale from 0 to 20. The total of the 3 quizzes constitutes 50% of the course grade. Final exam: The final exams is graded on a scale from 0 to 100. The final exam constitutes 50% of the course grade. Write a computer program in a script file that determines the course grade for a student. The program first asks the user to enter the 3 midterms grades (In a vector) and the grade of the final. Then the program calculates a numerical course grade (a number between O and 100). The course grade is rounded to one decimal points. Sample Output: Please enter Midterm 1 grade : 30 Input should be between 0 and 20, Please enter Midterm 1 grade : 20 Please enter Midterm 2 grade : 15 Please enter Midterm 3 grade : 17.8 Please enter final exam grade: 80 The course grade is 66.4 Click Below Matlab Link: https://matlab.mathworks.com For…
Integer userValue is read from input. Assume userValue is greater than 1000 and less than 99999. Assign tensDigit with userValue's tens place value. Ex: If the input is 15876, then the output is: The value in the tens place is: 7 2 3 public class ValueFinder { 4 5 6 7 8 9 10 11 12 13 GHE 14 15 16} public static void main(String[] args) { new Scanner(System.in); } Scanner scnr int userValue; int tensDigit; int tempVal; userValue = scnr.nextInt(); Your code goes here */ 11 System.out.println("The value in the tens place is: + tensDigit);
Need help to implement networking in python Server.py Load data from file This option will ask the user for a fully qualified path and will load a JSON file containing the information for users and pending messages. The format of the JSON file will be defined based on your implementation and it will the same used to save the data into file (menu option #4). Functionalities the server must provide: 1) User Sign Up: adds a user identified by a phone number to the system. a) Protocol: USR|username|password|display_name b) Response: 0|OK for success. 1| for an error. c) The server should validate that the username does not exist 2) User Sign In: verify user credentials a) Protocol: LOG|username|password b) Response: i) 0|OK → the credentials are correct. ii) 1|Invalid Credentials iii) 2|Already Logged In → in case that the user is logged in from another client. c) This will help the server knowing which user is connected. d) The server should keep a list of connected clients, which should…
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