Re: Question about namespace

I have written a little image processing class and one of the things
I do is calculate the power of an image defined as the sum of the
absolute values of all the pixels. Here's the snippet, where
nchannels (e.g. number of colors) and npoints (i.e. number of pixels
in the image) are a public variables:

file: utils.cpp

using namespace std;

template<class T>
vector<T>
image<T>::power(){

        vector<T> result(nchannels);
        vector<T> val(nchannels);

        for(int k=0;k<nchannels;k++) val[k] = (T)0.0;
        for(int i=0;i<npoints;i++){
                val = data.show(i);
                for(int j=0;j<nchannels;j++){
                        T tmpval = val[j];
                        T tmpval2 = T(abs(tmpval));

                        result[j] += tmpval;
                }
                }

        return result;
}

This works great for everything except for a personal wrapper I've
wrapped around complex numbers. Here's the first important bit of
mycomplex.h

file: mycomplex.h

#include <complex>

using namespace std;

class mycomplex: public complex<double>{

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