#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
#include <time.h>

void main()
{
    struct tm  time_of_day;
    time_t     ltime;
    auto char  buf[26];

    time( &ltime );
    _localtime( &ltime, &time_of_day );
    asctime_s( buf, sizeof( buf ), &time_of_day );
    printf( "Date and time is: %s\n", buf );
}