In this tutorial, we will learn how to create a simple text editor using the C++ programming language. This text editor will allow the user to input, save, and display text using basic file operations.

Objective:

The objective of this project is to demonstrate how C++ can be used to create a basic text editor that can read and write text to a file. We will cover how to use file handling functions like ofstream and ifstream to manage files and process user input.

Code:

#include 
#include 
#include 
using namespace std;

void displayMenu() {
    cout << "Simple Text Editor" << endl;
    cout << "1. Write Text" << endl;
    cout << "2. Read Text" << endl;
    cout << "3. Exit" << endl;
}

void writeTextToFile() {
    string text;
    ofstream outFile("editor.txt");

    cout << "Enter text to save to file (Type 'exit' to stop):" << endl;
    while (true) {
        getline(cin, text);
        if (text == "exit") break;
        outFile << text << endl;
    }

    outFile.close();
    cout << "Text saved to editor.txt" << endl;
}

void readTextFromFile() {
    string line;
    ifstream inFile("editor.txt");

    if (inFile.is_open()) {
        cout << "Text from file:" << endl;
        while (getline(inFile, line)) {
            cout << line << endl;
        }
        inFile.close();
    } else {
        cout << "Unable to open file!" << endl;
    }
}

int main() {
    int choice;
    while (true) {
        displayMenu();
        cout << "Enter your choice: "; cin >> choice;
        cin.ignore(); // to clear the input buffer after reading choice

        switch (choice) {
            case 1:
                writeTextToFile();
                break;
            case 2:
                readTextFromFile();
                break;
            case 3:
                cout << "Exiting Text Editor." << endl;
                return 0;
            default:
                cout << "Invalid choice! Please choose again." << endl;
        }
    }
    return 0;
}

Program Explanation:

This program implements a simple text editor in C++ that allows the user to perform three tasks:

• Write Text: The user can input text, and it will be saved to a file named editor.txt.
• Read Text: The user can view the contents of the editor.txt file.
• Exit: The program will terminate.

The program uses file handling features of C++ such as ofstream (output file stream) to write to a file, and ifstream (input file stream) to read from the file. It also uses simple getline() function to capture multi-line user input.

How to Run the Program:

1. Open your C++ IDE or text editor.
2. Copy and paste the code provided above into a new file.
3. Save the file with a .cpp extension (for example, TextEditor.cpp).
4. Compile the program using your IDE or the command line.
5. Run the compiled program.
6. You can choose to write or read from the file based on the displayed menu.