| Graphic calculator as a mathematical learning tool in a national based education ,has been paid more and more attention by educational and managerail institutions and schools, and many large foreign companies have committed to study graphic calculator. In our country , graphic calculators have been used in a number of schools and has made great achievements in the teaching of mathematics. But before the graphic calculator is mainly used in personal computers and even mainframes, some handheld devices also have defects in the functional deficiencies. Mobile Internet as one of the fastest growing industries in the new generation of information technology innovation, has abundant prospects,and begin to globalize both in business models or patterns of enterprise development , the App Store model will continue to lead the mobile internet era, and the combination of iPhone OS platform and the App Store is the most dazzling star. so the invention of iphone os platform based on graphic calculator for mobile learning and education based on iPhone OS platform has great value in the promotion of market and teaching of education.The dissertation does some research in the applying of graphic calculator based on iPhone OS application, and analyse the background of research of the graphic calculator based on mobile internet, the status quo of graphic calculator at home and abroad, the applying prospects and significance of graphic calculator, as a result proposes the graphic calculator based on ios platform. The graphic calculator includes four parts:the platform of background calculation ,the platform of computer algebra system (cas), the platform of functional program, the platform of functional image . The platform of background calculation use the algebra calculation of giac as the core, and is responsible for parsing,calculation of the string and the returning of the results of calculation; responsible for compiling and running of C-language program, the returning of the result of string. Computer algebra system refine the function, display the funcitongin the interface to the user through analyzing giac; when the user input parameters to the background, the parametres display in the interface after calculated.The platform of functional program redefines some functions via a simple programming language like c-language,and the program compiled by the the platform of background computer could run the function defined by ourselves like the the platform of computer algerbra system. The platform of functional image input the expression of function,then display the graphics and transforms through calling the calculation of giac package and the underlying function of calculation and the transforming function of pixel.The graphic calculator has been verified the simplity and use of ease at the simulator of mactonish platform and the mobile telephone of iPhone OS platform. |
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