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Re: Problem using more classes... [message #35654 is a reply to message #35645]

Sat, 10 March 2012 13:49

Sender Ghost
Messages: 301
Registered: November 2008

Senior Member

Hello, Matteo.

idkfa46 wrote on Fri, 09 March 2012 17:18

calling function prod() from the same class (prova3) there are no problems but if I try to call back sum(x, y) from a different class (prova4) I receive the following error:

'prova4::sum' : illegal call of non-static member function
c:\myapps\prova3\prova3.h(28) : see declaration of 'prova4::sum'

Where I'm wrong today ?!

As compiler message said, you need static prova4::sum function to use it this way:

class prova4 {
public:
	static int sum (int x, int y) { return x + y; }
};

Else you need to create object instance of prova4 class for using it:

prova4 p;
int result = p.sum(1, 2);

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[Message index]

		Problem using more classes... By: idkfa46 on Fri, 09 March 2012 17:18
		Re: Problem using more classes... By: Sender Ghost on Sat, 10 March 2012 13:49
		Re: Problem using more classes... By: idkfa46 on Tue, 13 March 2012 17:26

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