File Input and Output

Reading and writing text files

fstream enables persistent storage for logs, configs, and generated reports. Always check stream state for errors.

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

int main() {
    ofstream out("notes.txt");
    out << "C++ File I/O basics" << endl;
    out.close();

    ifstream in("notes.txt");
    string line;
    getline(in, line);
    cout << line << endl;
}

I/O reliability tips

• Check if file streams are open before reading.
• Use binary mode for non-text data.
• Avoid silent failures by validating stream status.