Whatever I have up till now accepted as most true and assured I have gotten either from the senses or through the senses. But from time to time I have found that the senses deceive, and it is prudent never to trust completely those who have deceived us even once.勒内·笛卡尔,《第一哲学沉思录》如果有一段引述用来描述C语言编程的话,那就是它了。