function a = r8po_zeros ( n )

%*****************************************************************************80
%
%% R8PO_ZEROS zeroes an R8PO matrix.
%
%  Discussion:
%
%    The R8PO storage format is used for a symmetric positive definite 
%    matrix and its inverse.  (The Cholesky factor of an R8PO matrix is an
%    upper triangular matrix, so it will be in R8GE storage format.)
%
%    Only the diagonal and upper triangle of the square array are used.
%    This same storage scheme is used when the matrix is factored by
%    R8PO_FA, or inverted by R8PO_INVERSE.  For clarity, the lower triangle
%    is set to zero.
%
%    R8PO storage is used by LINPACK and LAPACK.
%
%  Licensing:
%
%    This code is distributed under the MIT license. 
%
%  Modified:
%
%    01 August 2015
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, integer N, the order of the matrix.
%    N must be positive.
%
%    Output, real A(N,N), the R8PO matrix.
%
  a = zeros ( n, n );

  return
end