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c++coutcinistream

How to make sure cin opened the file properly?

I have this code :

static std :: ifstream s_inF(argv[j]);
std :: cin.rdbuf(s_inF.rdbuf());

How can I make sure it opened the file properly and there is no problem ?

I mean I would like to write something like:

static std :: ifstream s_inF(argv[j]);
std :: cin.rdbuf(s_inF.rdbuf());
if(.....)
{
  cout << "can not open the file" << endl;
  return 0;
}
...
.....
....
cin.close();

any suggestion ?

Solution

  • You can use is_open for this. See here:

    http://www.cplusplus.com/reference/fstream/ifstream/is_open/