Median Solution - Intro to Computer Science Udacity English Japanese

Median Solution - Intro to Computer ScienceYouTube↗ IA↗(long shot)
Education 2.5K views 15 likes 1 dislikes 23 Feb 2015

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One way to solve this problem, is to look at the possibilities.

この問題を解く1つの方法は可能性を見ていくことです

We know that there is a bigger number, the median, and a smaller number.

大きな数値、中央値、小さな数値があることは分かりますね

And that we have 3 inputs--

そして入力される数値は3つです

Let's call them "a," "b," and "c."

a、b、cと呼ぶことにしましょう

Let's say, for the sake of example-- that we figure out that "b" is the bigger number.

例えばbが大きな数値であると分かっていると仮定しましょう

We could solve this using the bigger function that you defined in lecture.

コースで定義したbigger関数を使えば分かります

>From here, we only need to figure out what is the median and the smaller number.

そうすればあとは中央値と小さな数値を特定するだけです

We know "b" can't be the median,

bが大きな数値であると分かっているので

because we just decided that it was the bigger number.

bは中央値にならないことが分かります

>From here, all we have to do is compare "a" and "c."

あとはaとcを比較するだけです

There are two cases at this point.

この時点では2つのケースがあります

One is where "a" is greater than "c."

1つはaがcより大きい場合です

If "a" is greater than "c," we know "c" is the smaller number--

もしaがcより大きいなら cが小さな数値で

and "a" is the median.

aが中央値であることが分かります

If "c" is greater than "a," we know that "a" is the smaller number--

もしcがaより大きいなら aが小さな数値で

and "c" is the median.

cが中央値であることが分かります

We can use this strategy to solve every possible case when defining our function.

関数を定義する際にはこの要領で起こり得るすべてのケースを考えることができます

So let's take a crack at it by going right to the interpreter.

早速インタプリタで試してみましょう

So, first let's define our function.

まず関数を定義します

As specified in the problem, it's called median--and we take in 3 parameters.

問題で指定されたようにmedianと名づけます 3つのパラメータを使用します

As I did before, we are going to call them "a," "b," and "c."

先ほどと同様にa、b、cとしましょう

As I described earlier, we want to find the biggest number first, let's call it "big."

説明したようにまず最大値を見つけますそれをbigとしましょう

Here's the perfect time to use the function that we defined in class, "biggest."

コースで定義したbiggest関数を使う絶好の機会です

"Biggest" will give us the biggest number, as the name describes--

biggestという名前が表すとおりこれに3つのパラメータを渡すだけで

by simply passing in those 3 parameters.

一番大きな数値を得られます

>From here, we enumerate the possible cases.

このあとは可能性のあるケースを見ていきます

As I described earlier, if "a" is the biggest number,

先ほど解説したようにもしaが最大値なら

you want to return the bigger number of "b" and "c."

bとcのうち大きな方の数値を返します

If "b" is the biggest number, we want to return the bigger number of "a" and "c."

もしbが最大値なら aとcのうち大きな方の数値を返します

And lastly, if "c" is the biggest number,

最後にこのelseの条件を満たすのは cが最大値の場合です

which is satisfied by the else here, we want to return the bigger number of "a" and "b."

その時はaとbのうち大きな方の数値を返します

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