Strptime and strptime Functions

# Include <stdio. h>

# Include <time. h>

 

Int main (){

Struct TM;

Char Buf [255];

 

Strptime ("2001-11-12 18:31:01", "% Y-% m-% d % H: % m: % s", & TM );

Strftime (BUF, sizeof (BUF), "% d % B % Y % H: % m", & TM );

Puts (BUF );

Return 0;

}

These two functions are the format control functions of the time and date, which seem to be the opposite in terms of functionality.

Size_t strftime (char * s, size_t maxsize, char * format, const struct TM * timeptr)

Purpose: strftime format a tm structure as a string

Parameter: format is the output data format.

Char * strptime (const char * Buf, const char * format, struct TM * timeptr)

Purpose: strptime is to format a string into a TM structure.

Parameter: the time when the Buf is to be modified, generally the gps time.

Format is the data format, which must be consistent with the Buf time format. Otherwise, a segment error occurs.

 

%	Day of the week
%	Full name of the day of the week
% B	Abbreviated month format
% B	Full name of month
% C	Date and Time
% D	Date in month, 0-31
% H	Hour, 00-23
% I	Hour in decimal format, 01-12
% J	The date in the year, 001-366
% M	Month in year, 01-12
% M	Minute, 00-59
% P	Morning or afternoon
% S	Seconds, 00-60
% U	Day of the week, 1-7
% W	Day of the week, 0-6
% X	Date in local format