ferrors.cpp

本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向对象机制为主。学习者在学习过程中可以通过大量的程序实例和相关练习

// ferrors.cpp
// checks for errors opening file
#include <fstream>          // for file functions
#include <iostream>
using namespace std;

int main()
   {
   ifstream file;
   file.open("a:test.dat");

   if( !file )
      cout << "\nCan't open GROUP.DAT";
   else
      cout << "\nFile opened successfully.";
   cout << "\nfile = " << file;
   cout << "\nError state = " << file.rdstate();
   cout << "\ngood() = " << file.good();
   cout << "\neof() = " << file.eof();
   cout << "\nfail() = " << file.fail();
   cout << "\nbad() = " << file.bad() << endl;
   file.close();
   return 0;
   }