// section 6.4.6
void f(int x,...){
	int y;struct{int i[1];}z;

	(&z)->i;
	z.i[0];
	*z.i;
	*&x;
	x++;
	--x;
	x*y;
	x+y;
	-x;
	~x;
	!x;
	x/y;
	x%y;
	x<<x;
	x>>x;
	x<y;
	x>y;
	x<=y;
	x>=y;
	x==y;
	x!=y;
	x^y;
	x|y;
	x&y;
	x&&y;
	x||y;
	x?x:y;
	x=y;
	x*=y;
	x/=y;
	x%=y;
	x+=y;
	x-=y;
	x<<=y;
	x>>=y;
	x&=y;
	x^=y;
	x|=y;
	x,y;
}