Due to restriction of paper length there isn ' t scope to tell more , or to discuss topics such as subsidiary tables ( for handling complicated input validation or output generation ) , iterations , and feedback loops
2.
Given that the drawing of plane arrangement maps of electrified railway contact net is one of the important junctures of the whole contact net design , starting from the perspective of system , the paper firstly analyzes the drawing task of the plane arrangement maps of railway contact net in details and presents the structure and function of the system , secondly discusses the formulation of consumer menu and dialogue frame and lists the main controlling program of dialogue frame , then by analyzing the involved data of originally drawing course gives and realizes the management of the original drawing data , which achieves the drawing of choosing inter - station and station , the establishment of drawing papers and drawing form , the setting - up of character height and the drawing form coordinate points and drawing starting points and the preserving routes of data documents of drawing form and the note - marking column and the size of subsidiary table
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