C++: difference between reading a text file and opening a text file

[engggirl3000]

Another question I have, what is the difference between reading a text file to a program and opening a text file in the program?

A sample of one of the text files is formatted like this:

3

Jon Smith 20009 40 32 12 13 14 17 12

Wilma Vohn 76448 20 30 12 12 18 20 14

Mark Matthews 55642 50 52 15 16 16 15 17

[Extremist]

You open a file for the purposes to read from it:

fstream file1;
string line[20];
//open a file:   
 
file1.open(filename); 
 
// Read from a file 
 
while(! file1.eof())
        {
            getline(file1,line[x]);                                           // Fill line array
            x++;                                                          // count
        }