Functions with no arguments

/* 1502.c: Functions with no arguments */
#include <stdio.h>
#include <time.h>

void GetDateTime(void);

main()
{
    printf("Before the GetDateTime() function is called.\n");
    GetDateTime();
    printf("After the GetDateTime() function is called.\n");
    return 0;
}
/* GetDateTime() definition */
void GetDateTime(void)
{
    time_t now;

    printf("Within GetDateTime().\n");
    time(&now);
    printf("Current date and time is: %s\n", asctime(localtime(&now)));
}