一道算术题

int main()
{
	int a, b, c;
	a = 5;
	c = ++a;//c=6 a=6
	b = ++c, c++, ++a, a++;//c=8 a=8 b=7
	b += a++ + c;//b=23 a=9(+的优先级大于+=)
	printf("a=%d b=%d c=%d ", a, b, c);	//9 23 8
	return 0;
}