1.概述所谓系统程序设计语言,就是用来书写系统软件(如操作系统、编译系统等)的高级语言。早期的系统软件是用机器指令或汇编语言书写的,具有费工、难懂、难改、难调试等一系列缺点,并且很难由一台计算机移植到另一台计算机上去。因此,近年来提出了用高级语 1. Overview The so-called system programming language, is used to write system software (such as operating systems, compile systems, etc.) of the high-level language. Earlier system software was written in machine instructions or assembly language, with a series of shortcomings such as laborious, difficult to understand, difficult to change, difficult to debug, and difficult to port from one computer to another. Therefore, in recent years, advanced language has been proposed