class operations test

vagelis (106)
in the above code it prints 12 from a.displaya();
and then it doesnt print c.displaya()

is there an explanation about that??
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class A{
	int a;
public:
	A(int i) {a=i;}
	
	

	void operator()(const A & a )
	{
		this->a+=a.a+4;
		
	}

	const A operator+(const A& a)
	{
		return A(this->a +a.a);
	}

	const A& operator=(const A& a)
	{
		this->a =a.a;
		return *this;
	}
	
	int diplaya(void){return a;};
};
void main( void )
{

A a(4);
A b(5);
A c(4);

a(a);
cout<<a.diplaya();
c=a+b;
c.diplaya();
int k;
cin>>k;
}
kspangsege (43)
I'm absolutely positively sure that you can find this error yourself. Come on!!! :-)
vagelis (106)
maybe because i need this??because of the return A(this->a +a.a);
(inside the const A operator+(const A& a){return A(this->a +a.a);})

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A(const A& a)
	{
		this->a =a.a;
	}


but if i put his in the class it doesnt go in there
kspangsege (43)
No no, you just forgot a 'cout<<' in front of 'c.diplaya();'
vagelis (106)
no my mistake i didnt write it here

it doesnt write something even if the cout exists..
kspangsege (43)
Well, let's see the version of the program that you have troubles with. If I add 'cout<<' in front of 'c.diplaya();' in your program, it works exactly as I would expect it to. It writes '12' followed by '17'.
Last edited on
vagelis (106)
sory you are correct
i am a little confused from too much studying i have to do a break..

thank you!!
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