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--- programming:cpp:unixtime [2022/05/05 07:45]
odagawa created
+++ programming:cpp:unixtime [2022/09/12 08:38] (current)
odagawa
@@ Line 14: / Line 14: @@
   // int64_t unixtime_i = 1651736619; // 2022-05-05 16:43:39
-  // time_t now = (time_t)unixttime_t;
+  // time_t now = (time_t)unixtime_t;
   time_t now = std::time(nullptr); // 現在時刻
-  tm *tm_event = localtime(&unixtime); // 現地時間に直す
+  tm *tm_event = localtime(&now); // 現地時間に直す
   int year = tm_event->tm_year + 1900; // tm_year は 1900 年始まり
   int month = tm_event->tm_mon + 1; // tm_mon は 0 始まり
   int day = tm_event->tm_mday;
+  std::cout << year << "/" << month << "/" << day <<std::endl;
   std::exit(0);
@@ Line 29: / Line 31: @@
 </code>
-''tm'' は以下のような定義
+''tm'' は以下のように定義されている
+<code cpp>
+struct tm {
+    int  tm_sec;    /* seconds after the minute [0-60] */
+    int  tm_min;    /* minutes after the hour [0-59] */
+    int  tm_hour;   /* hours since midnight [0-23] */
+    int  tm_mday;   /* day of the month [1-31] */
+    int  tm_mon;    /* months since January [0-11] */
+    int  tm_year;   /* years since 1900 */
+    int  tm_wday;   /* days since Sunday [0-6] */
+    int  tm_yday;   /* days since January 1 [0-365] */
+    int  tm_isdst;  /* Daylight Savings Time flag */
+    long tm_gmtoff; /* offset from CUT in seconds */
+    char *tm_zone;  /* timezone abbreviation */
+};
+</code>
+[[https://tool.konisimple.net/date/unixtime|Unixtime 変換ツール]]

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