Tadziu Hoffmann wrote:
a better definition would have been:
define d2r {($1)*pi/180}Yes. Macros are expanded by simple textual substitution. They are totally disconnected from the language syntax. It is a cardinal rule that parameters which you see as subexpressions in formulas be parenthesized in the macro definition to assure that they are treated as such regardless of what is substituted. The same rule applies to macros in C and troff. We all learn it the hard way. Doug
