In this chapter, ALPHA routines which are intended to be modified by the user are described.
Normally, only three routines have to be provided by the user: initialization (QUINIT), event analysis (QUEVNT), and program termination (QUTERM). Models for these three subroutines are available (see Appendix C). Other subroutines which may be modified by the user are also described in this chapter.
User routines can be provided either as a plain Fortran file or as a CVS source file; the alpharun command file described in Appendix C supports both options.
For all user routines, default versions exist in the ALPHA library which are loaded automatically if no user code is given.