Thread: void* error

  1. #1
    Registered User
    Join Date
    Dec 2010

    void* error

    Hi all.

    I've a problem with the void*. I explain it:

    void leggi_vettore(void* & v, int n, int t){
    		v = new float[n];
    	}else if(t==0){
    		v = new unsigned short[n];
    	}else cout << "Error!";
    	for (int i=0 ; i<n ; i++){
    		cout << "Inserimento in posizione [ " << i << " ]: ";
    		cin >> v[i];
    I want to have a dynamic array and I want to decide with "int t" if it must be float or unsigned short.
    When I did "cin >> v[i];" the compiler makes this error: "void* is not a pointer to object type".

    What I can do?

  2. #2
    Registered User
    Join Date
    Jun 2005
    You need to convert v to an appropriate (non-void) pointer type, otherwise v[i] is invalid (there is no such thing in C++ as an array of voids).

    All the compiler knows about v in your last loop is that it is a pointer to void. It does not magically keep track of the fact you've created arrays of different types just beforehand - hence the complaint.
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy or unhelpful in reply to you, or tell you you need to demonstrate more effort before you can expect help, it is likely you deserve it. Suck it up, Buttercup, and read this, this, and this before posting again.

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