According to the modern software engineering technology , the system develop models and fashions were analyzed and compared . it was designed using a high - level programming language ( vb6 ) and a geographic information system component ( mo2 ) to develop the system , in accordance with spiral model 按照現(xiàn)代軟件工程的管理方法,分析和研究了農(nóng)田地理信息系統(tǒng)的開發(fā)模型與開發(fā)方式,提出了采用螺旋式模型,以通用高級編程語言結(jié)合地理信息系統(tǒng)組件的系統(tǒng)開發(fā)方案。
Our purpose is to supply a common method for type information collection of high - level programming languages , so that we can lower the difficulty of the implemention of type system and the possibility of occurence of the program errors ; simplify the intermediate presentation of high - level programming language , so that we can do code generation and optimization conveniently 目的是為高級語言的類型信息的提取提供一般方法,從而降低類型系統(tǒng)實現(xiàn)的難度以及產(chǎn)生程序錯誤的可能性,并且簡化高級語言的中間表示,便于后端的代碼生成和優(yōu)化。
A high-level programming language is a programming language with strong abstraction from the details of the computer. In comparison to low-level programming languages, it may use natural language elements, be easier to use, or may automate (or even hide entirely) significant areas of computing systems (e.