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Updated Boost datetime Examples Translated (markdown)

Howard Hinnant
2017-07-07 21:38:58 -04:00
parent ff4852e301
commit 9f99dcc68a
1 changed files with 25 additions and 27 deletions
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20
Boost-datetime-Examples-Translated.md

@@ -520,8 +520,7 @@ main()
```
<a name="Seconds_Since_Epoch"></a>
### Seconds Since Epoch
#include "date.h"
```c++
#include "tz.h"
#include <iostream>
@@ -534,22 +533,21 @@ main()
auto nyc_time = make_zoned("America/New_York",
local_days(2004_y/oct/4) + 12h + 14min + 32s);
std::cout << nyc_time << '\n';
auto time_t_epoch = sys_days(1970_y/1/1);
std::cout << time_t_epoch << '\n';
auto sys_epoch = sys_days{};
std::cout << sys_epoch << '\n';
// first convert nyc_time to utc via the get_sys_time()
// call and subtract the time_t_epoch.
// call and subtract the sys_epoch.
auto sys_time = nyc_time.get_sys_time();
auto diff = nyc_time.get_sys_time() - time_t_epoch;
// Expected 1096906472
std::cout << "Seconds diff: " << diff.count() << '\n';
std::cout << "Seconds diff: " << sys_time - sys_epoch << '\n';
// Take leap seconds into account
auto utc_time = utc_clock::sys_to_utc(sys_time);
auto utc_epoc = utc_clock::sys_to_utc(time_t_epoch);
diff = utc_time - utc_epoc;
auto utc_time = to_utc_time(sys_time);
auto utc_epoc = to_utc_time(sys_epoch);
// Expected 1096906494, an extra 22s
std::cout << "Seconds diff: " << diff.count() << '\n';
std::cout << "Seconds diff: " << utc_time - utc_epoc << '\n';
}
```