November 2016
Beginner to intermediate
816 pages
19h 58m
Japanese
Content preview from Cクイックリファレンス 第2版
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568
18
章 標準ライブラリ関数
変換指定子 構造体メンバ 出力表記
y tm_year
年の下2桁 10進数（
00
から
99
）
Y tm_year
年、10進数（例、2005）
z tm_isdst
あれば、グリニッジ標準時からのずれ、なければ何もなし
（例、+0200であれば2時間ちょうど GMTより東）
Z tm_isdst
あれば、時間帯の名称または略記。なければ何もなし
%
（なし） パーセント記号（
%
）
strftime()
関数は、終端ナル文字をカウントせずに出力バッファに書き込んだ文字列の
長さを返す。引数
n
で指定した範囲より出力が長いと、
strftime()
は0を返し、出力バッ
ファの内容は未定義となる。
■
例
time_t now = {0};
time(&now);
struct tm* localnow = localtime(&now);
char hdr_date[999] = "";
if (strftime(hd
r_date, 78, "Date: %a, %d %b %Y %T %z", localnow))
{
puts(hdr_date);
}
else
{
return -1;
}
RFC 2822
＊
1
スタイルでデータフィールドを出力
Date: Thu, 10 Mar 2005 13:44:18 +0100
■
参照
●
asctime()
,
ctime()
,
mktime()
,
localtime()
,
gmtime()
,
wcsftime()
,
snprintf(
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.