给出描述光波通过傍轴光学系统衍射的柯林斯公式及其逆运算表达式。

Collins formula, which describes the diffraction of light wave passed through a near-axis optical system, and its inverse calculation expression are presented in this paper.

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说明：用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。

Simple arithmetic expressions, including addition, subtraction, etc. , to enter an equal sign marks the end of the STL.

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在我们的四则运算表达式里面我们可以利用继承实行从一元到二元操作符的表示，但它实质上会干扰测试。

In our arithmetic expressions we could have used inheritance to get from a unary to a binary operator node, but that would substantially violate the test.

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I just want to remind you, if I wanted to, for example, type in an expression like that, notice the syntactical form, it's an expression, a number, followed by an operand, followed by another expression.

我想要提醒下大家，如果你想要，例如，输入一个这样的表达式，注意语法形式，这是个表达式，一个数字，后面是一个运算对象，后面是另外一个表达式。

麻省理工公开课 - 计算机科学及编程导论课程节选

In there, I want to make this distinction, this nuance: the evaluator is still going to be taking those expressions and using its rules to get a value, but it's not going to print them back out.

在这里，我想要做这么一个，细微差别：运算器依然会,对表达式,进行求值，但是不会,显示结果值。

麻省理工公开课 - 计算机科学及编程导论课程节选

The interpreter is going to get a value for it.

处理器会对表达式运算得到一个结果值。

麻省理工公开课 - 计算机科学及编程导论课程节选