Internship 1.cpp

#include <iostream>
#include <fstream>
using namespace std;

int main() {
    int choice;
    string text;

    do {
        cout << "\n===== FILE HANDLING TOOL =====\n";
        cout << "1. Write to File\n";
        cout << "2. Read File\n";
        cout << "3. Append to File\n";
        cout << "4. Exit\n";
        cout << "Enter your choice: ";
        cin >> choice;

        switch(choice) {

            case 1: {
                ofstream file("data.txt");  // write mode (overwrite)
                cin.ignore();
                cout << "Enter text: ";
                getline(cin, text);

                file << text;
                file.close();

                cout << "✅ Data written successfully!\n";
                break;
            }

            case 2: {
                ifstream file("data.txt");
                string line;

                if (!file) {
                    cout << "❌ File not found!\n";
                    break;
                }

                cout << "\n📂 File Content:\n";
                while (getline(file, line)) {
                    cout << line << endl;
                }

                file.close();
                break;
            }

            case 3: {
                ofstream file("data.txt", ios::app); // append mode
                cin.ignore();
                cout << "Enter text to append: ";
                getline(cin, text);

                file << "\n" << text;
                file.close();

                cout << "✅ Data appended successfully!\n";
                break;
            }

            case 4:
                cout << "👋 Exiting program...\n";
                break;

            default:
                cout << "⚠ Invalid choice!\n";
        }

    } while(choice != 4);

    return 0;
}