Re: Is still math.h the C++ math library ?

[AciD_X]

The contents of <math.h> and <cmath> are not the same: <math.h> is
specified to define functions in the global namespace, <cmath> in the
namespace std.

I wasn't commenting on implementation at all.

Jonathan

Do they differ in any way other than the namespace they are in ?

 

[Jonathan Turkanis]

Do they differ in any way other than the namespace they are in ?

That's the only difference.

Jonathan

 

[Bobo]

That's the only difference.

If my memory is right <cmath> includes also overloads for every
<math.h> function, using float instead of double.
<math.h> <cmath>
double sin(double x) double std::sin(double x);
float std::sin(float x);
....

Regards.
Bobo.

 

[Rob Williscroft]

Bobo wrote in

If my memory is right <cmath> includes also overloads for every
<math.h> function, using float instead of double.
<math.h> <cmath>
double sin(double x) double std::sin(double x);
float std::sin(float x);

Nope in C++ <math.h> is something like this:

#include <cmath>

using std::sin;
/* repeat the above line for every name that
<cmath> declares in namespace std
*/

Rob.

 

[Jonathan Turkanis]

If my memory is right <cmath> includes also overloads for every
<math.h> function, using float instead of double.
<math.h> <cmath>
double sin(double x) double std::sin(double x);
float std::sin(float x);
...

You're right that the C standard library header <math.h> is not the
same as the C++ standard hread <math.h>, but I was sepcifically
talking about the C++ standard library.

In addition, the C99 header <math.h> includes stuff that the C++
header doesn't.

Jonathan