?std time example
Make an assumption about how the time maps to UTC. For example, you can assume that an ambiguous time is always expressed in the time zone's standard time. If the ambiguous time is an item of data entered by the user, you can leave it to the user to resolve the ambiguity. Ordinarily, an ambiguous time is handled by calling the GetAmbiguousTimeOffsets method to retrieve an array of TimeSpan objects that contain the ambiguous time's possible UTC offsets. However, this example makes the arbitrary assumption that an ambiguous time should always be mapped to the time zone's standard time. The BaseUtcOffset property returns the offset between UTC and a time zone's standard time. A duration of time is defined as a specific number of ticks over a time unit. One example is a duration such as “3 minutes” (3 ticks of a “minute”). Other examples are “42 milliseconds” or “86,400 seconds,” which represents the duration of 1 day. The bias value to be used during local time translations that occur during standard time. This member is ignored if a value for the StandardDate member is not supplied. This value is added to the value of the Bias member to form the bias used during standard time. In most time zones, the value of this member is zero. A description for daylight saving time. For example, PDT could indicate Pacific Daylight Time. The C++ standard library also provides the standard C and POSIX interfaces to deal with date and time. In <ctime>, the macros, types, and functions of <time.h> are available in namespace std. The types and functions are listed in Table 5.25. The following example illustrates how to convert an ambiguous time to UTC by assuming that it represents the local time zone's standard time. The example consists of a method named ResolveAmbiguousTime that determines whether the DateTime value passed to it is ambiguous. The bias is the difference, in minutes, between Coordinated Universal Time (UTC) and local time. All translations between UTC and local time are based on the following formula: UTC = local time + bias. This member is required. A description for standard time. Defined in header <ctime>. char* ctime( const std::time_t* time ); Converts given time since epoch to a calendar local time and then to a textual representation, as if by calling std::asctime(std::localtime(time)). The resulting string has the following format: Www Mmm dd hh:mm:ss yyyy. Www - the day of the week (one of Mon, Tue, Wed, Thu, Fri, Sat, Sun). From Wikipedia, the free encyclopedia. A time standard is a specification for measuring time: either the rate at which time passes; or points in time; or both. In modern times, several time specifications have been officially recognized as standards, where formerly they were matters of custom and practice. An example of a kind of time standard can be a time scale, specifying a method for measuring divisions of time. A standard for civil time can specify both time intervals and time-of-day. Standardized time measurements are made using a clock to count periods of some cyclic change, which may be either the changes of a natural phenomenon or of an artificial machine.
A kind of time standard can be a time scale, specifying a method for measuring divisions of time.