An AST program normally has the following structure:
/* Include the interface to the AST library. */ #include "ast.h" /* Main program (or could be any function). */ main () { <normal C declarations and statements> /* Enclose the parts which use AST between the astBegin and astEnd macros. */ astBegin; <C statements which use AST> astEnd; <maybe more C statements> }
The use of astBegin and astEnd is optional, but has the effect of
tidying up after you have finished using AST, so is normally
recommended. For more details of this, see . For
details of how to access the ``ast.h'' header file, see
and the description of the
``ast_dev'' command in
.
AST A Library for Handling World Coordinate Systems in Astronomy