Consider the following two implementations of the same algorithm, each written in a different language.
考虑以下同一算法的两种实现，每种实现都使用不同的语言编写。

Language A: 语言 A：
Calculate the average daily rainfall for the week (averageRainfall) by adding together the rainfall totals for each of the 7 days of the week (sun, mon, tue, wed, thu, fri, and sat) and dividing the sum by 7.
将一周 7 天（周日、周一、周二、周三、周四、周五和周六）每天的降雨量总数相加，然后将总和除以 7，计算出一周的平均每日降雨量（平均降雨量）。

Language B: 语言 B：
Take the total amount of rain from each day of the week (sunday, monday, tuesday, wednesday, thursday, friday and saturday) and then average them together to get the average daily rainfall for the week (averageRainfall).
计算一周中每天（星期日、星期一、星期二、星期三、星期四、星期五和星期六）的总降雨量，然后将其平均，得到该周的平均每日降雨量（平均降雨量）。

Which of the following statements about these two implementations is true?
以下关于这两种实现的说法中哪一项是正确的？

Question

Consider the following two implementations of the same algorithm, each written in a different language.
考虑以下同一算法的两种实现，每种实现都使用不同的语言编写。

Language A:  语言 A：
Calculate the average daily rainfall for the week (averageRainfall) by adding together the rainfall totals for each of the 7 days of the week (sun, mon, tue, wed, thu, fri, and sat) and dividing the sum by 7.
将一周 7 天（周日、周一、周二、周三、周四、周五和周六）每天的降雨量总数相加，然后将总和除以 7，计算出一周的平均每日降雨量（平均降雨量）。

Language B:  语言 B：
Take the total amount of rain from each day of the week (sunday, monday, tuesday, wednesday, thursday, friday and saturday) and then average them together to get the average daily rainfall for the week (averageRainfall).
计算一周中每天（星期日、星期一、星期二、星期三、星期四、星期五和星期六）的总降雨量，然后将其平均，得到该周的平均每日降雨量（平均降雨量）。

Which of the following statements about these two implementations is true?
以下关于这两种实现的说法中哪一项是正确的？

BlackTom AI · Accepted Answer

First, restating the scenario helps frame the evaluation: we have two algorithmic implementations described in different languages that compute the average daily rainfall over a week. The question asks which statement about these implementations is true.

Option 1: Language A is ambiguous because it is unclear what sun, mon, tue, wed, thu, fri, and sat refer to in context with the problem.
- This claim focuses on the identifiers for the days in Language A. The description explicitly mentions seven days (sun, mon, tue, wed, thu, fri, sat) as the quantities to be summed, so the intent is clear: these are the daily rainfall totals for each day of the week. The idea of summing these seven values and dividing by 7 to get an average is a standard, well-understood procedure. There is no inherent ambiguity about what those identifiers represent, given the problem statement clearly enumerates the seven daily values. Therefore, this option’s assertion of ambiguity is not strongly supported by the text.

Option 2: Language B is ambiguous because the process of “average” is not explained well
- This option argues that the averaging step is underspecified. Language B describes taking the total amount of rain from each day and then averaging them to obtain the weekly average. In typical programming problems, this description is sufficiently explicit: compute the mean of seven numbers. While the wording could be more formal (for example, specifying that the mean is computed as the sum of the seven values divided by 7), the core mathematical operation is clear and standard. The claim of ambiguity rests on a relatively weak grounds, since the intent (average of seven daily values) is explicit and unambiguous enough for a straightforward implementation.

Option 3: The algorithms in both languages are ambiguous because they do not specify the actual values of the seven daily rainfall totals.
- This statement asserts that not knowing the actual numerical values makes the algorithms ambiguous. However, typical algorithmic descriptions specify operations on variables (sun, mon, tue, wed, thu, fri, sat) regardless of their concrete values. Ambiguity about concrete data values does not necessarily imply ambiguity about the algorithm itself; the algorithm’s correctness is about the procedure, not the particular numbers. Hence, the absence of numbers does not render the approach ambiguous.

Option 4: Neither of these languages is clear enough that a programmer could write a correct solution in a high-level programming language.
- This is a broad claim suggesting both descriptions fail to provide enough detail for implementation. Yet, as noted, the fundamental steps are: collect seven daily rainfall totals and compute their average. In many real-world tasks, a programmer could indeed implement a correct solution from these descriptions in a high-level language, assuming standard variable mapping and arithmetic. The statement overgeneralizes the sufficiency of the descriptions and is not strongly supported by the given text.

In summary, Option 2 asserts ambiguity in the averaging step, which, while arguably arguable depending on strictness, is not as robust as the others’ claims and contrasts with the clear, conventional interpretation of averaging seven numbers. Option 1 overstates the ambiguity about the day identifiers, Option 3 overemphasizes value specifics as the source of ambiguity, and Option 4 extends the critique beyond what is actually implied by the minimal descriptions. The critical assessment of each option highlights why the perceived ambiguity in the averaging description is the most defensible objection among the four options, while the others rely on stronger or less grounded claims about ambiguity or completeness.

(72ab92) AP CS Principles (72ab92) AP 计算机科学原理 1.2 AP-Style MC Practice 1.2 AP 风格的 MC 练习

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