#include <iostream>
#include <fstream>
#include <string>
 
int main() {
    std::ofstream outFile("data.txt");
    
    if (outFile.is_open()) {
        outFile << "Hello, World!" << std::endl;
        outFile << "C++ file handling" << std::endl;
        outFile.close();
        std::cout << "File written successfully!" << std::endl;
    }
    
    std::ifstream inFile("data.txt");
    std::string line;
    
    if (inFile.is_open()) {
        while (std::getline(inFile, line)) {
            std::cout << line << std::endl;
        }
        inFile.close();
    }
    
    return 0;
}