File I/O

Differences

	#include <fstream.h> #include <stdlib.h>
	Declare stream
	Check on successful opening of file
	Use stream name in I/O statements

Declaration
Format
streamtype streamname ("filename");
for streamtype ofstream or ifstream
streamname a programmer defined id
filename the name of the external file

Example

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>

main () {
char ch;
ofstream out ("sample.out");
if (!out) {
    cerr << "File could not be opened" << endl;
    exit (1);
}
cout << "Please enter your section number\n";
out << "Section: ";
for (int i=0; i<4; i++) {
    cin >> ch;
    out << ch;
}
out << endl;
}