在不同的软件或硬件平台上，外部运算系统接口和应用程序接口是不同的。
External operating system interfaces and application programming interfaces (APIs) are different on different hardware and software platforms.
记住，整形数运算要比浮点数运算快得多，因为处理器可以直接进行整型数运算，浮点数运算需要依赖于外部的浮点数处理器或者浮点数数学库。
Remember, integer arithmetic is much faster than floating-point arithmetic, as it can usually be done directly by the processor, rather than relying on external FPUs or floating point math libraries.
微处理器执行代码指令进行算术运算，内部数据的传递以及与外部设备通信。
A microprocessor executes encoded instructions to perform arithmetic operations, internal data transfer, and communications with external devices.
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