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Annotation of coherent/a/usr/man/ALL/cast, revision 1.1

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        !             2: 
        !             3: cast                        Definition                       cast
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        !             8: The cast  operation ``coerces'' a variable from  one data type to
        !             9: another.
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        !            11: There are two  reasons to cast a variable.  The  first is to con-
        !            12: vert a  variable's data into  a form acceptable to  a given func-
        !            13: tion.  For example, the function hhyyppoott takes two ddoouubbllees.  If the
        !            14: variables lleegg_xx and lleegg_yy are ffllooaatts, the rules of C require that
        !            15: they be cast automatically to ddoouubbllee.  If the compiler did not do
        !            16: not do  this, hhyyppoott  would grab a  ddoouubbllee's worth of  memory: the
        !            17: four bytes of your ffllooaatt,  plus four bytes of whatever happens to
        !            18: be sitting on the stack.  The leads to results that are less than
        !            19: totally accurate.
        !            20: 
        !            21: The other reason to cast a  variable is when you cast one type of
        !            22: pointer to another.  For example,
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        !            24: 
        !            25:         char *foo;
        !            26:         int *bar;
        !            27:         bar = (int *)foo;
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        !            29: 
        !            30: Although ffoooo and  bbaarr are of the same length,  you would cast foo
        !            31: in this instance to stop  the C compiler from complaining about a
        !            32: type mismatch.
        !            33: 
        !            34: ***** See Also *****
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        !            36: data formats, data types, definitions
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        !            64: COHERENT Lexicon                                           Page 1
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