[C++] Derive a class from a tamplate

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello to all .... excuse for my bad english

I've the following problem writing a simple program. I would use the metods of std::valarray class adding some self writed method for elemnts of double type.

I've thought something like this:

/****************************/
using namespace std;

class mvector : public valarray<double>
{
mvector();
mvector(int size);
}

mvector :: mvector() : valarray<double>() {}
mvector :: mvector(int size) : valarray<double>(size) {}

int main()
{
  mvector v(3);
v = (v+2.0);
}

/*****************************/

Compiling this code I obtain the following error:

geom.cpp: In function `int main()':
geom.cpp:38: error: no match for 'operator=' in 'v = std::operator+(const
 std::valarray<_Tp>&, const _Tp&) [with _Tp = double]((&1.0e+0))'
geom.cpp:22: error: candidates are: mvector& mvector::operator=(const mvector&)
make: *** [geom.o] Error 1

Why can't I use the operator = like I do with valarray?






[Index of Archives]     [Linux C Programming]     [Linux Kernel]     [eCos]     [Fedora Development]     [Fedora Announce]     [Autoconf]     [The DWARVES Debugging Tools]     [Yosemite Campsites]     [Yosemite News]     [Linux GCC]

  Powered by Linux