The purpose of this method is to store the currently displayed number into the accumulator, to store the specified operation as well, and to reset the display for input of the next operand.

此方法的目的就是：将目前所显示的数值存储到此累加器、存储特定的操作以及为了下一个操作数的输入而重置显示。

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In a case where a transformation begin, but aborts before completion, there are no facilities to guarantee that this condition will result in the reset of all input parameters to their previous state.

在一种转换开始，但在完成前中止的情况下，没有设备可以保证该情况将导致所有输入参数重新设置成先前的状态。

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Otherwise, the original character is placed in the output stream, and the input stream is reset to the original position.

否则，将原来的字符放到输出流中，并且将输入流重置到原始位置。

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