March 2017
Intermediate to advanced
364 pages
9h 45m
Japanese
Content preview from 初めてのPHP
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76
4
章 データのグループ：配列の操作
●
多次元配列の個々の要素にアクセスする。
●
foreach()
や
for()
を使って多次元配列の各要素を参照する。
●
文字列内の多次元配列要素を補間する。
4.7
演習問題
＊1
1.
米国国勢調査局によると、2010 年の米国の 10 大都市（人口）は次の通りであった。
●
New York, NY（8,175,133 人）
●
Los Angeles, CA（3,792,621 人）
●
Chicago, IL（2,695,598 人）
●
Houston, TX（2,100,263 人）
●
Philadelphia, PA（1,526,006 人）
●
Phoenix, AZ（1,445,632 人）
●
San Antonio, TX（1,327,407 人）
●
San Diego, CA（1,307,402 人）
●
Dallas, TX（1,197,816 人）
●
San Jose, CA（945,942 人）
都市と人口に関する上記の情報を持つ配列を定義しなさい。都市と人口の情報だけでなく、10
都市の総人口も加えた表を出力しなさい。
2.
結果表の行が人口順になるように前の演習問題の結果を修正しなさい。次に、行が都市名順に
なるように結果を修正しなさい。
3.
演習問題 2. で作成した表に、10 都市の州別人口の総計の行も追加するように修正しなさい。
4.
次に挙げたさまざまな情報に対して、（1）配列への情報の格納方法、 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.