'complex' undeclared identifier

I am writing a program using complex numbers. By #including the <complex> library in my .cpp file I can work with it just fine. If I want to define a function in a header file like this:

int Matrixmult((complex<double>)* , (complex<double>)* , (complex<double>)* );

I get an error C2065: 'complex': undeclared identifier. I don't really understand this because I have #included the <complex> library before the header file in my .cpp file:

#include <complex>
#include <iostream>
#include <fstream>
#include <string>
#include <functions_refl.h>

where the last one is my header file.

Try std::complex instead.

ok, thank you, that works.

Now I get an error C2059: syntax error: ',' though

Code:

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int Matrixmult((std::complex<double>)* , (std::complex<double>)* , (std::complex<double>)* );

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I don't see why I can't use a comma in a function definition.

That is a declaration. But first I'd try removing the ( and ): eg
int Matrixmult(std::complex<double>*, ...);
If that doesn't work, then post the smallest compilable snippet of code that demonstrates the problem.

Get rid of those parentheses, e.g.,

Code:

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int Matrixmult(std::complex<double>*, std::complex<double>*, std::complex<double>*);

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ok, that did it :) I don't know why I put them there in the first place. I must say that I think the compiler's error message is not the clearest I've ever seen.

The compiler was confused, just as you were. It didn't know what was wrong and so spit out an unintelligible error message.