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Output Streams (ostream)

Definition

CGAL defines output operators for classes that are derived from the class ostream. This allows to write to ostreams as cout or cerr, as well as to strstreams and fstreams. Let os be an output stream.

Operations

The output operator is defined for all classes in the CGAL kernel and for the class Color as well.

ostream& os << Class c Inserts object c in the stream.

Example


#include <CGAL/config.h>
#include <iostream>
#include <fstream>

#include <CGAL/Cartesian.h>
#include <CGAL/Segment_2.h>

typedef CGAL::Point_2< CGAL::Cartesian<double> >     Point;
typedef CGAL::Segment_2< CGAL::Cartesian<double> >   Segment;

int main()
{
    Point p(0,1), q(2,2);
    Segment s(p,q);

    CGAL::set_pretty_mode(std::cout);
    std::cout << p << std::endl << q  << std::endl;

    std::ofstream f("data.txt");
    CGAL::set_binary_mode(f);
    f << s << p ;

    return 1;
}
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The GALIA project. Jan 18, 2000.