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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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.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.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.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.
rint
533
rint
C99
浮動小数点数を整数値に丸める
#include <math.h>
double rint(double
x
);
float rintf(float
x
);
long double rintl(long double
x
);
rint()
関数は浮動小数点数を現在の丸め方向で次の整数値に丸める。現在の丸め方向は
fegetround()
と
fesetround()
関数を使って読み込み変更できる浮動小数点環境の属性だ。
rint()
関数は、丸めた結果が引数と異なると、（実装に依存して）
FE_INEXACT
例外を起こす
ことを除けば
nearbyint()
関数と同様。
■
例
struct round_modes {
const int id;
const char* str;
};
struct round_modes arrModes[] =
{
#ifdef FE_TONEAREST
{ FE_TONEAREST,
"FE_TONEAREST: round to nearest representable value" },
#endif
#ifdef FE_DOWNWARD
{ FE_DOWNWARD, "FE_DOWNWARD: round toward -Inf" },
#endif
#ifdef FE_UPWARD
{ FE_UPWARD, "FE_UPWARD: round toward +Inf" },
#endif
#ifdef FE_TOWARDZERO ...
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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.