C++ File handling: Create text file and write text

Last update on December 20 2024 12:29:10 (UTC/GMT +8 hours)

Write a C++ program to create a new text file and write some text into it.

Sample Solution:

C Code:

#include <iostream>  // Include the input/output stream library

#include <fstream>   // Include the file stream library

int main() {
  // Create a new file named "test.txt"
  std::ofstream outputFile("test.txt");  // Open/create a file named "test.txt" for writing

  if (outputFile.is_open()) {  // Check if the file was successfully opened
    // Write some text into the file
    outputFile << "C++ is a high-level, general-purpose programming language created by Danish computer scientist Bjarne Stroustrup. \n";  // Write a line of text to the file
    outputFile << "First released in 1985 as an extension of the C programming language, it has since expanded significantly over time. \n";  // Write a line of text to the file
    outputFile << "Modern C++ currently has object-oriented, generic, and functional features, in addition to facilities for low-level memory manipulation.\n";  // Write a line of text to the file
    outputFile << "It is almost always implemented in a compiled language.\n";  // Write a line of text to the file
    outputFile << "Many vendors provide C++ compilers, including the Free Software Foundation, LLVM, Microsoft, Intel, Embarcadero, Oracle, and IBM.";  // Write a line of text to the file

    // Close the file
    outputFile.close();  // Close the file after writing

    std::cout << "Text has been written to the file." << std::endl;  // Display a success message
  } else {
    std::cout << "Failed to create the file." << std::endl;  // Display an error message if file creation failed
  }

  return 0;  // Return 0 to indicate successful execution
}

Sample Output:

Text has been written to the file.

Explanation:

In the above exercise -

• Use the std::ofstream class to create a new file named "test.txt".
• Check if the file was successfully opened using the is_open() function.
• If the file is open, use the output stream operator << to write text to the file.
• Finally, close the file using the close() function.

After running this program, a new file named "example.txt" will be created in the same directory as the program, and the specified text will be written into it.

Flowchart:

CPP Code Editor:

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