typedef struct

#include <stdio.h>
#include<stdlib.h>
 
struct date
{
    char month[10];
    int day;
    int year;
};
 
typedef struct date BIRTHDAY;
 
BIRTHDAY X;

void get_birthday()
{
    puts("Enter birthday in a format as ( January 20 1970)");
    scanf("%s%d%d", X.month, &X.day, &X.year);
}

main(void)
{
    char first_name[10];
    int age, i;
    int month;
    
    
    if(get_name(first_name)<=5) 
      printf("Your name is short\n");
    else
      printf("your name is long\n");
        printf("\n");
 
    age=get_age(); //get user age
 
    if(age<=20)
        printf("You still baby\n");
    else
        for(i=21; i<=age; ++i)
            printf("Boy are you OLD!\n" );
            printf("\n");
 
    printf("Average of entered integers is %.2f\n", get_average_of_integers()); 
    printf("\n");
 
    printf("What month is now? (1-12)");
    scanf("%i", &month);
    
    what_holiday_in_this_month(month);
    printf("\n");
 
    
    get_birthday(); //passing struct to function
    
    printf("%s %i, %i\n", X.month, X.day, X.year);    [COLOR="Red"] //не уверена что правильно но работает[/COLOR]   
}