Header for MAXDOUBLE

In w开发者_如何学Gohat header is max value for double defined?

#include <limits>
int main()
{
  std::cout << "Maxvalue for double: " << std::numeric_limits<double>::max();
  return 0;
}

If you're using C++ the standard way of achieving this is with:

#include <limits>
std::numeric_limits< double >::max();

On my system (VS 10) it's float.h. The define is DBL_MAX 1.7976931348623158e+308

There is cfloat, which gives you DBL_MAX.

If you are working with VS, you can see this link: http://msdn.microsoft.com/en-us/library/s3f49ktz.aspx