AUD 1 - Dates

#include <stdio.h>
struct date {
    int year;
    int month;
    int day;
};
typedef struct date date;

int compare(date d1,date d2){
    if(d1.year>d2.year)
            return 1;
    else if(d1.year<d2.year)
            return -1;
    else if(d1.month>d2.month)
            return 1;
    else if(d1.month<d2.month)
            return -1;
    else if(d1.day>d2.day)
            return 1;
    else if(d1.day<d2.day)
            return -1;
    else return 0;
}

int days(date d1,date d2){
    int days=d1.day-d2.day;
    days+=(d1.month-d2.month)*30;
    days+=(d1.year-d2.year)*365;
    return days;
}

void read(date *d){
    scanf("%d.%d.%d",&d->day,&d->month,&(*d).year);
}
void print(date *d){
printf("%02d.%02d.%02d\n",d->day,d->month,d->year);
}
int main()
{
    date d1;
    date d2;
    read(&d1);
    read(&d2);
    int res=compare(d1,d2);
    if(res==0)
    {
     printf("The dates are equal \n");
    }
    if(res>1)
    {
        printf("The difference in days is %d days",days(d1,d2));
    }
    else
    {
        printf("The difference in days is %d days",days(d2,d1));
    }
    return 0;
}