尽管 C 语言问世已近 30 年，但它的魅力仍未减退。C 语言继续吸引着众多的人们，他们为了编写新的应用程序，或者移植或维护现有的应用程序而必须学习新技能-advent of nearly 30 years, but its charm has yet to subside. C language continues to attract a large number of people, in order to prepare them to the new application procedures, or transplantation or maintenance of existing applications and have to learn new skills