![]() ![]() Suppose you want to retrieve the current system date and time, either as a local time or as a Coordinated Universal Time (UTC). This function can be used to format date and time in a specific format. This function calculates the difference in seconds between time1 and time2. This returns the calendar-time equivalent of the time found in the structure pointed to by time.ĭouble difftime ( time_t time2, time_t time1 ) The time is represented in Coordinated Universal Time (UTC), which is essentially Greenwich Mean Time (GMT). int utime ( const char filename, struct utimbuf times ) int utime32 ( const char filename, struct utimbuf32 times ) int utime64 ( const char filename, struct utimbuf64 times ) int wutime ( const wchart filename, struct utimbuf times ) int wutime32 ( const wchart filename, struct utimbuf32 times ) int. This returns a pointer to the time in the form of a tm structure. This returns a pointer to a string that contains the information stored in the structure pointed to by time converted into the form: day month date hours:minutes:seconds year\n\0 ![]() 1 is returned if the time is not available.Ĭhar * asctime ( const struct tm * time ) This returns a value that approximates the amount of time the calling program has been running. This returns a pointer to the tm structure representing local time. Struct tm *localtime(const time_t *time) This returns a pointer to a string of the form day month year hours:minutes:seconds year\n\0. This returns the current calendar time of the system in number of seconds elapsed since January 1, 1970. If times is a null pointer, the access and modification times of the file shall be set to the current time. All these functions are part of standard C and C++ library and you can check their detail using reference to C++ standard library given below. The utime() function shall set the access and modification times of the file named by the path argument. Int tm_isdst // hours of daylight savings timeįollowing are the important functions, which we use while working with date and time in C or C++. Int tm_min // minutes of hour from 0 to 59 Int tm_sec // seconds of minutes from 0 to 61 The structure type tm holds the date and time in the form of a C structure having the following elements − The types - clock_t, size_t and time_t are capable of representing the system time and date as some sort of integer. There are four time-related types: clock_t, time_t, size_t, and tm. To access date and time related functions and structures, you would need to include header file in your C++ program. C++ inherits the structs and functions for date and time manipulation from C. The C++ standard library does not provide a proper date type. ![]()
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