通过完成预测分析法的语法分析程序，了解预测分析法和递归子程序法的区别和联系。使了解语法分析的功能，掌握语法分析程序设计的原理和构造方法，训练掌握开发应用程序的基本方法。-Prediction Analysis by completing the parser to understand the analysis and prediction of difference between the recursive subprogram and contact. To understand the function of syntax analysis, syntax analysis program designed to master the principles and construction methods, training to master the basic method of developing applications.