CODEWITHSUNDEEP
c++
hmmmmmm
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Reputation: 67

Getting Expected a type specifier error in c++

I have a pair of base-derived classes ( IND = base of MA, MA = derived from IND; ST= base of ST1, ST1 = derived from ST) and another class (FD). I'm trying to use them like:

class ST1: public ST{


public:

FD f;

ST1(){};

ST1(FD& a) : f(a) {};

MA abc(f, 10);

};

The errors I'm getting:

E0757   member "ST1::f" is not a type name
E0079   expected a type specifier
C2061   identifier 'f'

All errors are on the MA abc(f, 10); line.

Please note that MA doesn't have default constructor, takes FD&, int arguments and IND is a pure virtual class.

Upvotes: 0

Views: 1227

Answers (1)

molbdnilo
molbdnilo

Reputation: 66371

MA abc(f, 10);

looks to the compiler like a member function declaration, hence the error message - it expects f and 10 to be names of types.

For in-line member variable initialisation, you must use curly braces:

MA abc {f, 10};

but this isn't of much use to you as that would use f before you've initialised it.
(In-line initialisation is performed before any constructor initialisation; the order you write them in the class definition is irrelevant.)

Move its initialisation to the initialiser list instead:

ST1() : abc(f,10) {}
ST1(FD& a) : f(a), abc(f,10) {};

and leave the declaration as

MA abc;

Upvotes: 1

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