For a UNIX program in C++, write a code segment to get the HOME directory, set PREVDIR to the current working directory, and then change the working directory to the HOME directory
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For a UNIX program in C++, write a code segment to get the HOME directory, set PREVDIR to the current working directory, and then change the working directory to the HOME directory
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- Write a complete C or C++ program to implement a digital music archive program. The program should be able to allow the following operations through the menu structure. Use FILE to write the outputs, the song directory: Menu: 1- Add a new song to directory 2- Delete a song from the directory 3- List all songs in the directory 4- Search a song: Search according to song name Search according to singer's name А - B 5- Update song information 6- Sort according to song name 7- Sort according to singer's name 8- Quit struct date { int day, month, year; }; struct car { int ID; char songname[100], singersname[30], category[10]; struct date albumdate; }song_directory[100];Write a complete C or C++ program to implement a digital music archive program. The program should be able to allow the following operations through the menu structure. Use FILE to write the outputs, the song directory: Menu: 1- Add a new song to directory 2- Delete a song from the directory 3- List all songs in the directory 4- Search a song: A – Search according to ID B – Search according to category 5- Update song information 6- Sort according to ID A - In ascending order B – In descending order 7- Sort according to category in alphabetic order 8- Quit struct date { int day, month, year; }; struct car { int ID; char songname[100], singersname[30], category[10]; struct date albumdate; }song_directory[100];Computer Science Write a C/C++ program, call it findExt, to find all files in a directory hierarchy, whose extensions are in the extension list provided as arguments to the program. Your program should print the whole pathnames of the found files. Synopsis: findExt <extension-list> [-t target-directory] When target-directory is missing, the working directory (./) will be the target directory Some sample runs: $ findExt txt pdf That is, find all files whose extensions are either txt or pdf in the directory hierarchy ./ $ findExt jpg -t $HOME //target directory is home directory That is, find all files whose extensions is jpg in the directory hierarchy $HOME Requirement: - You must use the system call nftw() that allows you to walk across a file tree. This system call will do all the recursive walk and each time it visits a file or a directory, it will call your own function (a function that you pass as a parameter).
- Write a C/C++ language program that reads the file numbers.txt and checks each number for being a prime number. Only the prime numbers from these are then written to a text file prime.txt.In C write a program that takes a file name and two strings as command line arguments, and writes the longer of the two strings to the file with the given name. If the given strings are the same length, write the first string given to the file. If the user does not provide the correct number of command line arguments, print an error message and exit the program with a non-zero exit code.In C language, create a program that uses a standardized input method (input file with From To and Weight defined) to read in a text file. The text file will contain the name of the building and the distance from each building when running the program with the file, the program will read the information above and will ask users which buildings are they in and where they want to go to find the shortest path. then it will display the shortest route and the distance from the building that the user is at to the building that the user wants to go to
- Write a C++ program to create C++ menu driven programs on LIBRARY MANAGEMENT SYSTEM has book and student class with data members like book no, bookname, authorname. Books records is stored in a binary file. A student can issue book and deposit it within 15 days. Student is allowed to issue only one book. Student Records are stored in binary file. Administrator can add, modify or delete record.In this project, do not used graphics to keep program simple.Your C/C++ program must require a single command line argument, the name of an input file. The input file will be made up of lines with one or more integer values per line between -10 and 10, separated by a single space. For each line in the input file your program must output: • the line number of the input file (starting with line #1) • a single space • the integer sum of the numbers on that line • a single space • the smallest number on that line • a single space • the largest of the most frequent numbers on that line • a new line Example input file Expected output to console 10 7 4 5 1 26 4 10This Python Lab 9 Lab: Write a file copying program. The program asks for the name of the file to copy from (source file) and the name of the file to copy to (destination file). The program opens the source file for reading and the destination file for writing. As the program reads each line from the source file and it writes the line to the destination file. When every line from the source file has been written to the destination file, it close both files and print “Copy is successful.” In the sample run, “add.py” is the source file and “add-copy.py” is the destination file. Note that both “add-copy.py” is identical to “add.py” because “add-copy.py” is a copy of “add.py”. Sample run: Enter file to copy from: add.py Enter file to copy to : add-copy.py Copy is successful. Source file: add.py print("This program adds two numbers") a = int(input("Enter first number: ")) b = int(input("Enter second number: ")) print(f"{a} + {b} = {a+b}") Destination file:…
- The following question is related to C programming system call Task-1: Write a c program that will open a file given from the command line argument and then it will ask the user to input strings that will be written to that file. It will continue to ask the user to enter a string as long as the user enters “-1”. If the given file does not exist in the directory, then your program will automatically create the file.Write a C program that gets a source file name from a user. If the file does not exist, it will generate a proper error and exits.If the file exists, it also gets the name of two more files from the user, say destination1 and destination2. These files don’t need to exist as they are files that need to be written to. If the files cannot be opened for writing, a proper error will be generated. The program then reads the source file line by line. It will copy every line that has a digit in it to destination 2 and lines that have no digit in them to destination 1. Feel free to use ctype’s isdigit() function to identify digit characters. Example: If source file is:Hi My name is VeriaHello My name is John. How can I help you?I have a problem with my giga bit internet. The speed should be around 1000 but it’s just 200 Sure! I can help with that. Can I have your number in case we get disconnected? Sure! My number’s 647-123-1234 First file (destination 1) should be Hi My name is Veria Hello…Write a C++ program that opens three files (i.e. s1.txt, s2.txt, and s3.txt) and reads the data of three students. Each file contains the student first name and last name separated by a space and the student grades in three subjects as double floating-point numbers on the next line. The program should output the data in table format such that the data of each student is displayed on one line. The data of the students is ordered in the table alphabatically according to their names. The last column in the table contains the average grade of each student. The last row in the table contains the maximum grade in each subject. Notice that the width of the first column in the table is 20 and its is aligned to the left. All remaining columns have width of 7 and their data is aligned to the right. Also Notice, that all the numbers in the table must be displayed with exactly two decimal digits. IMPORTANT NOTES . Do not add any cout statements except for the final outputs as shown in the sample…