How to Implement C language for obtaining system time in Linux

How to Implement C language for obtaining system time in Linux

 

# Include <time. h> // header file of C Language
# Include <stdio. h> // I/O of C Language

Void main ()
{
Time_t now; // instantiate the time_t Structure
Struct TM * timenow; // instantiate the TM structure pointer
Time (& now );
// The time function reads the current time (International Standard Time is not Beijing time), and then transmits the value to now

Timenow = localtime (& now );
// The localtime function converts the time now obtained from time to the time in your computer (that is, the region you set)

Printf ("local time is % s/n", asctime (timenow ));
// In the previous sentence, the asctime function converts the time into characters and outputs the time using the printf () function.
}

Note: time_t is a struct defined in time. h. The prototype of the TM struct is as follows:

Struct TM
{
Int tm_sec; // seconds 0-61
Int tm_min; // minutes 1-59
Int tm_hour; // hours 0-23
Int tm_mday; // day of the month 1-31
Int tm_mon; // months since Jan 0-11
Int tm_year; // years from 1900
Int tm_wday; // days since Sunday, 0-6
Int tm_yday; // days since Jan 1, 0-365
Int tm_isdst; // Daylight Saving Time indicator
};

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