c#,c++,java提供了大量供解决具体问题的类库,这样在程序员要解决某种问题的时候,不用再去进行具体的底层操作,而直接调用系统封装好的步骤就好了,而且这些系统提供的类库,在运行效率和安全性上,比之程序员自己写的程序,可能会有不少优势.这样程序员就完全从底层繁复的操作中解脱出来,完全着力于高层设计.-c#, c++, java provides a number of libraries for solving specific problems, so that when the programmer to solve some problems, do not go to specific underlying operations, and direct calls to the system packaging good step like, but These systems provide libraries in operating efficiency and safety, the ratio of programmers to write their own programs, there may be a lot of advantages, so that the programmer is completely freed from the underlying complexity of the operation, entirely focused on high-level design .