What is the difference between using +/- versus = when setting file permissions? Is there any benefit of using instead +/- too set permissions?
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- Code done in C Write a piece of code in a function called password that creates a file with a random password (it can be a number). In another function called check_password, the function must ask the user to input the password to login and it should match the password in the file. If it doesn't, it should keep asking the user to keep inputting the right password. Finally, just by passing in the two functions into the main, that would be fine. Ex. int main() { ....password(....); ....check_password(....); }In this laboratory work, you are expected to write a c# console application to make someoperations about the customers. Operations and required featurest that you need to cover inyour program are following:• Add: This function adds a new person to json file. You need to get inputs from userand adds the new one into json file.• Display: This function displays all people in your json file.• Search: This function let you search with the user id.• Create Password: This function will create a random password for the user and usermay choose the length of the password. Password may include numbers andcharacters.• Exceptions: You need to handle exceptions as well. You should at least handle 3 ofexceptional cases. For the case that file can not be found, It is mandatory to catch theexception.This code is only for python. this is a game- transfer rings there are 3 problems which you are solving: A: failed transfer - make sure the progam dont take more than what the user inputed by raising an exceptionB: codE the trade_money function C: if sonic doesnt have as much as the user inputed, there will be an error pop up 'ERROR TRADE FAILED'. make it so the progam can run normally rather than turning it down. CODE: class user:def __init__(self, name, initial_money):self.name = nameself.money = initial_moneydef give_money(self, amount):self.money = self.money + amountdef take_money(self, amount):# Part A: Raise an exception as appropriateself.money = self.money - amountdef print_users(users):total_money = 0for user in users:print(f'{user.name:s} has {user.money:d} rings')total_money = total_money + user.moneyprint(f'There are a total of {total_money:d} rings')# B: code the trade_money functionsonic = user('sonic', 80)tails = user('tails', 20)print_users([sonic,…
- WAP in c++ that reads the file FIRST.TXT and creates a new file named SECOND.TXT, to contain only those words from the file FIRST.TXT which start with a lowercase vowel. [ plz give correct answer i have to prepare for my exams ]Need help with question. Sample output below. Coding language is python. Copy your solution from the question 1 into a new file and name it a2_q2.py. You must not overwrite your previous solution; the marking TA will want to see both files. You will add code to this new file (a2_q2.py) that allows the following functionalities. The user (customer) can now view the e-list to select items for purchase. They should be able to select the items by entering the corresponding number from the list. Again, invalid selections should be handled with suitable error messages and the list should be repeated (see sampleoutputs below). Once the customer has selected a product, the program should ask how many of that product the customer would like to buy. Your program must make sure that selected products are available in stock, otherwise it should generate error messages and the menu shouldbe repeated. After every valid selection is made, the current total should be printed, and the stock should be…Select the statement that is false regarding file guarding. Group of answer choices: In your .h files all code should be contained within the guards. It restricts the scope of a namespace, which prevents namespace pollution. If used properly it prevents redefinitions of classes/functions. It is an instruction to the preprocessor. It must make use of a unique identifier.
- in c++ Write a function named createOneStudent that will read in from the user the student info: id, name and gpa. It will use try-catch to handle the exception if the user provides a negative id or gpa that is out of bound (< 0.0 or > 4.0) by asking the user to re-enter them. It must provide the correct reason for the error and the actual error value. Then it will allow the user to try up to 3 times. This function will return the pointer of a newly created Student object or nullptr if the info is still incorrect. Note that this function can and will use cin and cout to read in values from the user. Here is an example of a run up to 3 times: Enter ID: -1 Enter GPA: 4.0 Enter name: John Smith Exception: negative id: -1 Enter ID: 1234 Enter GPA: 5.0 Enter name: John Smith Exception: out of bound gpa: 5.00 Enter ID: 1234 Enter GPA: 4.0 Enter name: John Smith ID(1234) NAME(John Smith) GPA(4.00) Here is an example of a run of 3 times and still not able to create it: Enter ID: 1234…Networking, TCP/IP requires one computer to function as the server and another to function as the client. The two computers must communicate using the same “language”. You will be building the server and the client. Write the program in C The Server Must accept commands in the form: PUSH “filename” fileSize <<<bytes>>> PUSH means that the client will be sending you a file. You need to store it with the filename sent. You must expect and require fileSize bytes. Respond to the client with “OK”. PULL “filename” PULL means that the client wants this file back. Respond with the number of bytes (use stat()), and then send all of the bytes to the client. Then respond with “OK” (a different send()). The server should take two parameters – the directory to work in and the port. The server should not shutdown. The server must have an accept() loop to allow multiple clients to connect (one at a time).Modify the attached c++ file , so that the program finds the number of times the isPalindrome function is called. (Hint: Use a global variable and increment it every time the function is called.)
- WAP in c++ that reads the file FIRST.TXT and creates a new file named SECOND.TXT, to contain only those words from the file FIRST.TXT which start with a lowercase vowel. [ i have already asked this question but u gave the wrong answer ...plz give correct answer i have to prepare for my exams ]Problem:A company has stock of many goods, and they want to filter the stock so that some of the materials can go on sale. The stock information recorded in a file"data.txt" as shown in the sample. (in the following sequence)(item name, price_perunit, profit, months_of_stocking, customer_reviews )The sale policy of the company depends on many factors according to the following. • if item in stock more than 8 months and item profit is more than average profit of all items o yes - if customer reviews low quality ● yes – sale 50% ● no – if customer reviews medium quality o yes – sale 30% o no – sale 15% o no- if item profit more than 8% of the item price ● Yes – if in stock more than 1 year o yes-sale 40% o no- not on sale ● No - not on sale Write a C++ program that reads the information from “data.txt” input file into 5 arrays, then processes these arrays to produce three arrays, first array holds the items on sale, second array holds percentage of sale , and the third one holds the…Q2:write a program in C++ called “count” that lets the user retrieve a word count or a letter count of a file that is passed as a command line argument. The user enters a flag (-l or -w) to indicate if they want a letter count (-l) or word count (-w). See the figure below for an example of the program’s output. You must use a switch statement to handle the options. You should also have at least three functions: one to print the usage, one to handle the word count, and one to handle the letter count. The program must be executed from a command line environment.