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Language in C 面试题与答案

Question: How do I display current date in the format given below?
Saturday October 12, 2002
Answer: Following program illustrates how we can display date in above given format.

#include
#include

main( )
{
struct tm *curtime ;
time_t dtime ;

char str[30] ;

time ( &dtime ) ;
curtime = localtime ( &dtime ) ;
strftime ( str, 30, "%A %B %d, %Y", curtime ) ;

printf ( "n%s", str ) ;
}
Here we have called time( ) function which returns current time. This time is returned in terms of seconds, elapsed since 00:00:00 GMT, January 1, 1970. To extract the week day, day of month, etc. from this value we need to break down the value to a tm structure. This is done by the function localtime( ). Then we have called strftime( ) function to format the time and store it in a string str.

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