C语言星号带括号的情形

C语言星号，当星号右侧是一个指针变量，星号和指针变量可看作一个整体，表示的是指针变量所指的内容；

C语言交换2个整数的程序；

void CXkxkView::OnDraw(CDC* pDC)
{
	CXkxkDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CString str1;
	int i1=9, i2=101;

	int * a = &i1;
	int * b = &i2;

	int temp = *a;
    *a = *b;
    *b = temp;

	str1.Format("%d",i1);
	pDC->TextOut(50, 50, str1);
	str1.Format("%d",i2);
	pDC->TextOut(50, 80, str1);

	int temp2 = (*a);
    (*a) = (*b);
    (*b) = temp2;

	str1.Format("%d",i1);
	pDC->TextOut(50, 140, str1);
	str1.Format("%d",i2);
	pDC->TextOut(50, 170, str1);

	int temp3 = (*   a);
    (*   a) = (*   b);
    (*    b) = temp3;

	str1.Format("%d",i1);
	pDC->TextOut(50, 230, str1);
	str1.Format("%d",i2);
	pDC->TextOut(50, 260, str1);
}