Question

Possible Duplicate:
Manipulate Input File Stream

C++ How to overload cin to read file

I was trying the following with operator overload..

struct myself
{
string myname;
}

istream &operator>> (istream &stream, myself &mm)
{
cout << "Enter my name:";
stream >> mm.myname;
return stream;
}

int main()
{
myself mm;
cin >> mm;

cout << mm.myname;

}

and its work, able to echo out what i actually type.

Now i trying to proceed with

cout << "Enter file name to read: ";

//assume user type myfile.txt

cin >> readFile;

How do i overload my cin to make it read file.

Consider my file is something like

sometextdocument.txt that contains data like

Map2D, [3, 2]
Dot3D, [25, -69, -33], [-2, -41, 58]
Map3D, [6, 9, -50]
Map2D, [3, 2]
Dot3D, [7, -12, 3], [9, 13, 68]
Map3D, [6, 9, 5]
Map2D, [3, 2]
Dot3D, [70, -120, -3], [-29, 1, 268]
Dot3D, [7, 12, 3], [-9, 13, 68]
Map3D, [1, 3, 8]
Dot2D, [5, 7], [3, 8]

And then i wanna cout << "Number of records read: " << number << endl;
then do a return stream, how do i overload it to work as cin read a file

Answer 1

Try like this: hope it will be helpful

istream &operator>> (istream &in, char* fname){ 
  inFile.open(fname);
  char ch1;
  while (inFile.get(ch1)) {
       cout<<ch1;
  }
}