111-cpp_io-ifstreamTest

ifstreamTest.cpp

#include <fstream>
#include <iostream>
using namespace std;
int main() {
  ifstream in1;
  in1.open("ifstreamTest1.txt");
  if (in1.fail()) {
    cout << "file opening is failed...\n";
    exit(1);
  }
  while (!in1.eof()) {
    int value = 0;
    in1 >> value;
    cout << value << "\n";
    cout << "good()=" << in1.good() << ",";
    cout << "fail()=" << in1.fail() << ",";
    cout << "bad()=" << in1.bad() << ",";
    cout << "eof()=" << in1.eof() << "\n";
    if (in1.good() == false) {
      break;
    }
  }
  in1.close();

  in1.open("ifstreamTest2.txt");
  if (in1.fail()) {
    cout << "file opening is failed...\n";
    exit(1);
  }
  while (!in1.eof()) {
    int value = 0;
    in1 >> value;
    cout << value << "\n";
    cout << "good()=" << in1.good() << ",";
    cout << "fail()=" << in1.fail() << ",";
    cout << "bad()=" << in1.bad() << ",";
    cout << "eof()=" << in1.eof() << "\n";
    if (in1.good() == false) {
      break;
    }
  }
  in1.close();
  return 0;
}