/* * Example program showing the use of the member * functions saveOn() and restoreFrom() for data * storage and retrieval. */ #include <rw/math/mathvec.h> #include <rw/pstream.h> #include <fstream.h> int main() { /* * Construct an integer vector a, with 24 elements. * The first element has value 0; each succeeding element * is incremented by 1. */ RWMathVec<int> a(24, 0, 1); // Store the vector to file "vec.dat" using class // RWpostream which saves in a portable ASCII format. { ofstream fstr("vec.dat", ios::out); RWpostream postr(fstr); a.saveOn(postr); } // A vector that has been saved using function saveOn() // may be restored using restoreFrom(). ifstream fstr("vec.dat", ios::in); // Construct a RWpistream from fstr: RWpistream pistr(fstr); RWMathVec<int> b; b.restoreFrom(pistr); // Restore from file "vec.dat" std::cout << a << std::endl; // Print the original 'a' std::cout << b << std::endl; // Print the restored 'b' }

Program Output:

[ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ] [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ]

You may also want to look at file vec.dat to see the storage format.