Question

I’m having a problem with one of my functions within a template class.


template <class T>
T complex<T>::returnMod()
{
T mod(0);
mod = sqrt(pow(re,2.0) + pow(im,2.0));
return mod;
}

I get the error: ‘warning C4244: ‘=’ : conversion from ‘double’ to ‘int’, possible loss of data’ for the line in bold. How can I tell the compiler to use the type called for each class object? I create two different types of complex number, some with int and some with double. Thank you.

Answer 1

The problem seems to be that you are instantiating complex with type int, and the compiler is doing exactly what you asked for. T is int, and the expression sqrt returns a double so it has to convert.

I am not sure what you meant with How can I tell the compiler to use the type called for each class object?, but this is expected behavior.