编译源程序： 1. 去掉“只读”属性。 2. 编译不受源文件位置和数据库位置的影响。即，GPACalculator的整个工程复制到任何地方都可编译。-Compile the source: 1. Remove the " read only" attribute. 2. Compiled from the source file location and the location of the database. That is, GPACalculator copy