multiple namespaces

[bob]

how do you import multiple namespaces from the same header?

[Ian Collins]

bo*@coolgroups.com wrote:

how do you import multiple namespaces from the same header?

How do you define import?

--
Ian Collins.

[Jim Langston]

<bo*@coolgroups.com> wrote in message
news:11*********************@u72g2000cwu.googlegro ups.com...

how do you import multiple namespaces from the same header?

Please explain what you want. It could be as simple as:
using namespace name1;
using namespace name2;

[bob]

i'm thinking of something like this:

#include "matrixlib.h"
using namespace name1;
using namespace name2;

but i don't think that works.

[osmium]

<bo*@coolgroups.com> wrote:

i'm thinking of something like this:

#include "matrixlib.h"
using namespace name1;
using namespace name2;

but i don't think that works.

I'm not sure I know what you want. This works, does it help?

#include <iostream>
#include <cmath>

namespace abc {
//------------------------
// return the sine of an angle expressed in degrees
double sin(double th)
{
static const double pi = 3.14159;
return std::sin(th * pi / 180.);
}
} // end namespace abc

using namespace std;
//===================
int main()
{
cout << abc::sin(45.) << endl; // degrees
cout << std::sin(.98); // radians
cin.get();
}