13.3.1. Reading and Writing

Try these first

1. 1.

   What class is used in C++ to write data to files?

   Hint

   Looks like output file stream.

2. 2.

   Which method would you use to read an entire line from a file?

   Hint

   It helps to read line by line.

3. 3.

   What is the purpose of the 'ofstream' class?

   • For reading from files
   • For writing to files
   • For annotating files

   Hint

   Think about what 'out' stands for.

4. 4.

   True or False: It is necessary to close a file after opening it in C++.

   • True
   • False

   Hint

   Remember what happens if you don't close it.

5. 5.

   Write a program that creates a file, writes some lines of text to it, and then reads those lines back to display on the console.

   Hint

   Look carefully at how you're writing and then reading the data.

6. 6.

   Explain what happens if you read from a file that doesn't exist. Write a code snippet to handle this error.

   Hint

   Think about checking if the file is open before trying to read.