参见清单8中的完整程序。
可以从Sandbox下载这一节中描述的完整程序。
You can download the full program described in this section from the Sandbox.
清单8展示了整个示例程序,而清单9展示了完整程序的执行示例。
Listing 8 shows the entire example program and Listing 9 shows an execution example of the completed program.
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