The limitations for the C language specifications in the PROTO procedure are as
follows:
•#define statements must be followed by a semicolon (;) and must be numeric in
value.
•The #define statement functionality is limited to simple replacement and unnested
expressions. The only symbols that are affected are array dimension references.
•The C preprocessor statements #include and #if are not supported. The SAS macro
%INC can be used in place of #include. ...
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