Macro redefinition compile time error

[BlaibelA]

#define FOO       1   

#define FOO       0.9

I had the above definitions in my code and cvi didn't complain while compiling, I thought it would, Can someone explain?

Thank you

[Constantin--P]

To get a warning for this you need to enable "Macro redefined" warning.

Options>>Build Options. Click on the "..." button in Compile Warnings section and check "Macro redefined" in Compilers Warnings dialog.