#include <iostream>
#include <fstream>
#include <string>

int main() {
    std::string keyword = "apple";
    std::string line;
    std::ifstream file("data.txt");

    if (file.is_open()) {
        while (std::getline(file, line)) {
            if (line.find(keyword) != std::string::npos) {
                std::cout << "Keyword found in file: " << line << std::endl;
            }
        }
        file.close();
    } else {
        std::cout << "Unable to open file";
    }

    return 0;
}