Program testing can be used to show the presence of bugs, but never to show their absence!
程序测试可以用来显示错误的存在,但永远不能显示它们的缺失!
There are no solutions. There are only trade-offs.
"To read is to voyage through time."
一个人的真正价值不在于他拥有什么,而在于他是什么。