File Handling

• What does C++ file handling refer to?

  Creating files and performing read/write operations
• Which header file must be included for file handling in C++?

  #include <fstream>
• What is the purpose of the ofstream class?

  To create or open and write to a file
• What is the purpose of the ifstream class?

  To read a file
• How do you create or open a text file in C++?

  Using ofstream writeFile("File1.txt");
• What is the correct way to write to a file in C++?

  writeFile << "Text";
• What does writeFile.close() do?

  It closes the file after writing
• How can you check if a file is open in C++?

  Using writeFile.is_open()
• What is the purpose of getline() in file reading?

  To read a line from the file
• How do you display the content of a file in C++?

  Using cout << text;
• What does the ios::out flag do?

  Creates or opens a file for writing
• What does the ios::in flag do?

  Reads a file
• What does the ios::app flag do?

  Appends new content to a file
• What are the steps to create, write, and close a file in C++?

  1. Include necessary headers: <code>#include <iostream></code> and <code>#include <fstream></code>
  2. Create an ofstream object: <code>ofstream writeFile("File1.txt");</code>
  3. Write to the file: <code>writeFile << "Text";</code>
  4. Close the file: <code>writeFile.close();</code>
• What are the steps to read and display the content of a file in C++?

  1. Include necessary headers: <code>#include <iostream></code> and <code>#include <fstream></code>
  2. Create an ifstream object: <code>ifstream readFile("File1.txt");</code>
  3. Check if the file is open: <code>if(readFile.is_open())</code>
  4. Use getline to read lines: <code>while (getline(readFile, text))</code>
  5. Display the content: <code>cout << text;</code>
  6. Close the file: <code>readFile.close();</code>
• What is an alternative way to handle files using fstream?

  • Use <code>fstream</code> for both reading and writing
  • Flags:
  • <code>ios::out</code> for writing
  • <code>ios::in</code> for reading
  • <code>ios::app</code> for appending