File Handling with fstream

C++ provides the fstream library for file input/output operations.

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

int main() {
  ofstream outFile("example.txt");
  outFile << "Hello, file!";
  outFile.close();

  ifstream inFile("example.txt");
  string content;
  getline(inFile, content);
  cout << content;
  inFile.close();
}

ofstream writes to files, and ifstream reads from files.