LinkLaunch
 Usage
• LinkLaunch["prog"]启动外部程序prog且打开一个到它的一个连接。
Notes
• LinkLaunch["prog"] 运行prog作为你当前Mathematica任务的辅助进程或子进程。
• 可以使用如同 LinkLaunch["math -mathlink"]的命令从你的Mathematica任务去启动一个辅助内核进程。
• 在大多数计算机系统，用相同的参数调用LinkLaunch["prog"] 几次将启动几个prog运行进程。
• 在一些计算机系统，LinkLaunch[ ] 将进行一个程序浏览。 • LinkLaunch 返回一个 LinkObject. • 选项LinkProtocol指定使用的隐含数据传输协议。 • LinkLaunch 内部调用相似于MathLink库中函数MLOpenArgv() 的一个函数。 • 参见 Mathematica 全书 : 节 2.12.7.
 Further Examples
LinkLaunch launches and connects to a program that is aware of MathLink. Here we launch a copy of Mathematica; a reason for doing this would be for two or more kernels to cooperate in solving a problem. This command works on any platform except the Macintosh.
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On the Macintosh you need to make a duplicate of MathKernel because you cannot launch an application from a single file more than once. Single quotes must surround the pathname if it contains spaces. This would be the command on the Macintosh: link = LinkLaunch["'MathKernel copy'"] MathLink communicates using packets. When the second kernel starts up, it sends a packet containing the first input prompt to the program that launched it.
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To send an expression to the second kernel for evaluation, wrap it in an EvaluatePacket; the result comes back in a ReturnPacket. The Unevaluated around the expression keeps it from evaluating before it is sent.
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When you are finished, quit the second kernel.
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