Question on operators

[Wynd]

Ok, I have been looking at some other posts here about this but I have a question.

class INT
{
public:
	INT() {}
	INT(int c) {a = c;}
	~INT() {}
	int getVal() {return a;}
	void operator = (int x) {a = x;}
	void operator = (INT x) {a = x.getVal();}
	INT& operator + (int x) {a += x; return *this;}
	INT& operator + (INT& x) {a += x.getVal(); return *this;}
private:
	int a;
};

I want to be able to do "INT aa=5; INT bb=7; INT cc = aa+bb" but I am not sure how. Can someone help me?