在生成和运行可执行程序时，始终检查是否存在编译错误。
Always check for compilation errors before you generate and run an executable program.
带启用断言检查运行程序产生下面的错误报告
Running the program with assertion checking enabled produces the following error report
因为这是打算用于通用目的而不是只被一小群人使用的实用程序，所以我们进行大量的错误检查以使它尽可能的健壮。
Since this is a utility meant for general purpose use, not just by a small group of people, we do a lot of error-checking to make it as robust as possible.
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