ensionalРUnit 6 Section 2 Passage AРThe father of Pascal language had said that “Program = algorithm + data structure”, so the significance of data structure to program design is self-evident. It is a particular way of storing anizing data in puter so that it can be used efficiently.?Nowadays, Computer has rated deeply into many fields of human society; the application is no longer limited into puting, but more for manipulating of non-putation. And the corresponding, the objects, which can be processed puter, has progressed from pure number to data with certain structure such as character、table and graphics and so on. Therefore, we must analyze the characteristic of these objects and the relationship between them. That is just the background of formation and development for data structure.