filehandle2.cpp

#include <iostream>
#include <fstream>
using namespace std;
/*
// Function to write multiple lines to file
void writeToFile(string filename, bool overwrite) {
    ofstream outfile;

    if (overwrite) {
        outfile.open(filename.c_str()); // Overwrite mode (default is trunc)
    } else {
        outfile.open(filename.c_str(), ios::app); // Append mode
    }

    if (!outfile) {
        cout << "Error opening file!" << endl;
        return;
    }

    cout << "Enter lines to write to the file (type 'END' on a new line to stop):\n";
    string line;
    cin.ignore(); // Clear input buffer

    while (true) {
        getline(cin, line);
        if (line == "END") break;
        outfile << line << endl;
    }

    outfile.close();
    cout << "Writing completed successfully.\n";
}
*/

void writeToFile(string filename, bool overwrite){
    ofstream outfile;

    if(overwrite){
        outfile.open(filename.c_str());
    }else{
        outfile.open(filename.c_str(),ios::app);
    }

    cout<<"Enter lines to insert (END to stop)"<<endl;
    string line;
    cin.ignore();
    while(true){
        getline(cin,line);
        if(line == "END") break;
        outfile<<line<<endl;
    }

    
}

// Function to display file content
void readFromFile(string filename) {
    ifstream infile(filename.c_str());

    if (!infile) {
        cout << "Error opening file for reading!" << endl;
        return;
    }

    string line;
    cout << "\nCurrent content of the file:\n";
    while (getline(infile, line)) {
        cout << line << endl;
    }

    infile.close();
}

int main() {
    string filename;
    char choice;

    cout << "Enter file name: ";
    cin >> filename;

    cout << "Do you want to overwrite the file? (y/n): ";
    cin >> choice;

    bool overwrite = (choice == 'y' || choice == 'Y');

    writeToFile(filename, overwrite);
    readFromFile(filename);

    return 0;
}