EOFを読んだらeof() == true

ふむふむ。

#include <iostream>
#include <fstream>

using namespace std;

int main() {
  ofstream fout("foo.txt");

  if (!fout.is_open()) {
    exit(1);
  }

  fout << "ABCDE";
  fout.close();

  ifstream fin("foo.txt");

  if (!fin.is_open()) {
    exit(1);
  }

  fin.seekg(-1, ios::end);
  cout << "eof:" << boolalpha << fin.eof() << endl;
  cout << static_cast<char>(fin.get()) << endl;
  cout << "eof:" << boolalpha << fin.eof() << endl;
  cout << fin.get() << endl;
  cout << "eof:" << boolalpha << fin.eof() << endl;
  fin.close();

  return 0;
}

eof:false

E

eof:false

−1

eof:true