Does the C language under Linux have a time function?

The C language standard library in Linux provides a set of time-related functions for processing operations such as dates, times, and time intervals. The most commonly used time functions are those defined in the time.h header file. function.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

The C language standard library in Linux provides a set of time-related functions for processing operations such as date, time, and time intervals. The most commonly used time function is the function defined in the time.h header file.

The following are some commonly used time functions:

• time(): Returns the number of seconds elapsed since January 1, 1970, used to calculate the current time of the system time.

• localtime(): Convert timestamp to a structure of local time.

• gmtime(): Convert timestamp to UTC time structure.

• strftime(): Format the time into a string according to the specified format.

• strptime(): Parse time from string and store it in structure form.

• difftime(): Calculate the difference (in seconds) between two times.

• mktime(): Convert the time structure into a timestamp.

• ctime(): Convert timestamp to string, expressed as local time.

• asctime(): Convert the time structure into a string, expressed as local time.

These functions provide the ability to process time and date in C programs, allowing you to obtain the current time, perform time conversion, format output and other operations.

To use these time functions, you need to include the time.h header file and link with the corresponding library (usually librt.so).

Please note that different operating systems may have differences, so it is recommended to consult relevant documents or manuals for accurate function definitions and usage when using it.

The above is the detailed content of Does the C language under Linux have a time function?. For more information, please follow other related articles on the PHP Chinese website!