C-XSC 2.0 - A C++ Library for Extended Scientific Computing Werner Hofschuster (1) and Walter Kraemer (1) (1) Bergische Universitaet Wuppertal, Scientific Computing/Software Engineering, 42097 Wuppertal, Germany Abstract In this note the main features and newer developments of the C++ class library for extended scientific computing C-XSC 2.0 will be discussed. The original version of the C-XSC library is about ten years old. But in the last decade the underlying programming language C++ has been developed significantly. Since November 1998 the C++ standard is available and more and more compilers support (most of) the features of this standard. The new version C-XSC 2.0 conforms to this standard. Application programs written for older C-XSC versions have to be modified to run with C-XSC 2.0. Several examples will help the user to see which changes have to be done. Note, that all sample codes given in [6] have to be modified to work properly with C-XSC 2.0. All sample codes listed in this note will be made available on the web page http://www.math.uni-wuppertal.de/~xsc/cxsc/examples.