File I/O question?

Here is the sample code from this site in the tutorial....

Code:

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
  char str[10];

  //Creates an instance of ofstream, and opens example.txt
  ofstream a_file ( "example.txt" );
  // Outputs to example.txt through a_file
  a_file<<"This text will now be inside of example.txt";
  // Close the file stream explicitly
  a_file.close();
  //Opens for reading the file
  ifstream b_file ( "example.txt" );
  //Reads one string from the file
  b_file>> str;
  //Should output 'this'
  cout<< str <<"\n";
  cin.get();    // wait for a keypress
  // b_file is closed implicitly here
}

Where does the "this" text come from, that forms in the program window?

May be a stupid question but I have read this code over and over and cant seem to find where it originates from....

Thanks...
-Fabrik8

The sentence "This text will now be inside of example.txt" is output to example.txt in the first few lines of code (using a_file).

Then example.txt is opened for input (using b_file) and the first word is read in. operator>> stops at the first whitespace after a non-whitespace character, meaning it reads only one word and stops at a space. That is why it reads in only the first word in the file, which happens to be "This".

The code then outputs that word.

BTW, str should really be a string, not a character array, but this code will work either way.

Originally Posted by Daved

The sentence "This text will now be inside of example.txt" is output to example.txt in the first few lines of code (using a_file).

Then example.txt is opened for input (using b_file) and the first word is read in. operator>> stops at the first whitespace after a non-whitespace character, meaning it reads only one word and stops at a space. That is why it reads in only the first word in the file, which happens to be "This".

The code then outputs that word.

BTW, str should really be a string, not a character array, but this code will work either way.

Thanks "Daved" I replaced the text with "This_is_where_the_text_will_output" for my notes and entered a /*note of space stop*/