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std::difftime

提供: cppreference.com
< cpp‎ | chrono‎ | c

 
 
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可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
関係演算子
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
ペアとタプル
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
フォワード、スワップ、および移動
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
 
C形式の日付と時刻のユーティリティ
機能します
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Functions
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時間操作
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Time manipulation
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difftime
time
clock
フォーマット変換
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Format conversions
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asctime
ctime
strftime
wcsftime
gmtime
localtime
mktime
定数
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Constants
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CLOCKS_PER_SEC
タイプ
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Types
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tm
time_t
clock_t
 
Defined in header <ctime>
double difftime( time_t time2, time_t time1 );
秒単位でtime_tオブジェクト(time2 - time1)など2カレンダ時間の差を計算.
Original:
Computes difference between two calendar times as time_t objects (time2 - time1) in seconds.
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目次

[編集] パラメータ

time1, time2 -
比較する回
Original:
times to compare
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[編集] 値を返します

秒単位で2つの時刻の差
Original:
Difference between two times in seconds
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[編集]

#include <iostream>
#include <ctime>
int main()
{
    std::time_t start = std::time(NULL);
    volatile double d;
    for(int n=0; n<10000; ++n)
       for(int m=0; m<100000; ++m)
           d += d*n*m; // some time-consuming operation
    std::cout << "Wall time passed: "
              << std::difftime(std::time(NULL), start) << " s.\n";
}

Output:

Wall time passed: 7 s.

[編集] も参照してください

(C++11)
時間間隔
Original:
a time interval
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(クラステンプレート) [edit]
C documentation for difftime