Open a file for input and read in its content : file open mode « File Stream « C++ Tutorial

1. C++ Tutorial
2. File Stream
3. file open mode

#include <fstream>
#include <iostream>
using namespace std;
   
int main () 
{
  char buffer[256];
 
  fstream myfile;
  // open it for input and read in
  myfile.open("test.txt",ios::in);
  myfile.getline(buffer,100);
  cout << "The file contains   " << buffer << "\n";
  myfile.close();
 
  return 0;
}

The file contains   This outputting a line.