Using NaN in c++

Is it possible to assign a double to NaN in c++ like:

Code:

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double number = NaN;

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Suggestions welcome...

Try typing it into a compiler and seeing if it compiles/runs correctly.

Quote:

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Originally posted by Hardboy
Is it possible to assign a double to NaN in c++ like:

Code:

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double number = NaN;

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Suggestions welcome...

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If you want to go down to that level and as your code will now not be portable among architectures, you might as well use inline assembler....

Code:

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__asm
{
//your instructions here
}

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Exercise for hardboy:


double NaN = 0.0 / 0;

double NaN = 1.0 / 0; // this one for infinite and NaN

and

int _isnan( double NaN );

int _finite( double NaN );

these two for testing the infinity or NaN characteristics


But before you begin, turn off hardware exceptions (you need not to do it in Win32, they are turned off already)