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c++ Programming Glossary: pi_over_180

constant variables not working in header

http://stackoverflow.com/questions/2328671/constant-variables-not-working-in-header

const double PI_under_180 180.0f PI extern const double PI_over_180 PI 180.0f I get the following error 1 MyDirectX.obj error LNK2005.. in main.obj 1 MyDirectX.obj error LNK2005 double const PI_over_180 PI_over_180@@3NB already defined in main.obj 1 MyGame.obj error.. 1 MyDirectX.obj error LNK2005 double const PI_over_180 PI_over_180@@3NB already defined in main.obj 1 MyGame.obj error LNK2005..