C++ Files and Streams

In C++ programming we are using the iostream standard library, it provides cin and cout methods for reading from input and writing to output respectively.

To read and write from a file we are using the standard C++ library called fstream. Let us see the data types define in fstream library is:

C++ FileStream example: writing to a file

Let's see the simple example of writing to a text file testout.txt using C++ FileStream programming.

Output:

The content of a text file testout.txt is set with the data:
Welcome to javaTpoint.
C++ Tutorial.

C++ FileStream example: reading from a file

Let's see the simple example of reading from a text file testout.txt using C++ FileStream programming.

Note: Before running the code a text file named as "testout.txt" is need to be created and the content of a text file is given below:
Welcome to javaTpoint.
C++ Tutorial.

Output:

Welcome to javaTpoint.
C++ Tutorial.

C++ Read and Write Example

Let's see the simple example of writing the data to a text file testout.txt and then reading the data from the file using C++ FileStream programming.

Output:

Writing to a text file:  
 Please Enter your name: Nakul Jain    
Please Enter your age: 22  
 Reading from a text file:   Nakul Jain  
 22