在异常处理中处理析构函数。

这是一个为说明在异常处理中调用析构函数的示例，为了清晰地表示流程，程序中加入了一些cout语句，输出有关的信息，以便读者对照结果分析程序。-In the exception handling to handle destructor. This is a descr iption of the exception handler to call the destructor of the sample, in order to clear that process, the program added some cout statement, the output-related information for readers to control the results of analytical procedures.