关于汇编语言,以下叙述中正确的是()。
- A.汇编语言程序可以直接在计算机上运行
- B.将汇编语言源程序转换成目标程序的系统软件称为解释程序
- C.在汇编语言程序中,不能定义符号常量
- D.将汇编语言源程序翻译成机器语言程序的系统软件称为汇编程序
正确答案及解析
正确答案
解析
汇编语言(Assembly Language)是面向机器的程序设计语言。在汇编语言中,用助记符代替操作码,用地址符号或标号代替地址妈。这样用符号代替机器语言的二进制码,就把机器语言变成了汇编语言。于是汇编语言亦称为符号语言。使用汇编语言编写的程序,机器不能直接识别,要由一种程序将汇编语言翻译成机器语言,这种起翻译作用的程序叫汇编程序,汇编程序是系统软件中语言处理系统软件。汇编语言把汇编程序翻译成机器语言的过程称为汇编。
汇编语言比机器语言易于读写、易于调试和修改,同时也具有机器语言执行速度快,占内存空间少等优点,但在编写复杂程序时具有明显的局限性,汇编语言依赖于具体的机型,不能通用,也不能在不同机型之间移植。
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