#include <stdio.h>

//
// Calculates the exact age of sombody or somthing
// currently assumes leap years do not exsist.
// y_* = year
// m_* = month
// d_* = day
//

int main() {

// finds date of birth and current date
int m_bday, d_bday, y_bday, m_now, d_now, y_now;
printf("Enter your Date of Birth\nMM/DD/YYYY\n");
scanf("%d/%d/%d",&m_bday,&d_bday,&y_bday);
printf("Enter the current date\n");
scanf("%d/%d/%d",&m_now,&d_now,&y_now);
// number of days of previous month
int mdays;  //days in current month
int pmdays; //days in previous month
int bmdays; // days in birthday month
int feb;    // days in febuary
int day;    // final result for day
int month;  // final result for month
int year;   // final result for year

// leap year
int leap;   // divisable by 4
int leap_2; // divisable by 100
int leap_3; // divisable by 400
leap = y_now % 4;
leap_2 = y_now % 100;
leap_3 = y_now % 400;

if ( leap == 0 && ( (leap_2 != 0) || leap_3 == 0 ))  {
    feb = 29;
}
else {
    feb = 28;
}

// days in previous month
if ( m_now == 1,2,4,6,8,9,11 ) {pmdays = 31;}
if ( m_now == 5,7,10,12 ) {pmdays = 30;}
if ( m_now == 3 ) {pmdays = feb;}
// days in current month
if ( m_now == 1,3,5,7,8,10,12 ) {mdays = 31;}
if ( m_now == 4,6,9,11 ) {mdays = 30;}
if ( m_now == 2) {mdays = feb;}
// days in birthday month
if ( m_bday == 1,2,4,6,8,9,11 ) {bmdays = 31;}
if ( m_bday == 5,7,10,12) {bmdays = 30;}
if ( m_bday == 2) {bmdays = feb;}

// checks to see if date is valid
if ( d_bday > bmdays || m_now > mdays ||  m_bday > 12 || m_now > 12) {
    printf("invalid date.\n");
    return 0;
}
// days
if ( d_now >= d_bday ) {
    day = d_now-d_bday;
    if ( m_now >= m_bday) {
        month = m_now-m_bday;
        if ( y_now >= y_bday) {
            year = y_now-y_bday;
        }
        else {
            printf("you are not alive\n");
            return 0;
        }
    }
    else {
        month = 12-m_bday+m_now;
        if ( y_now > y_bday) {
            year = y_now-y_bday-1;
        }
        else {
            printf("you are not alive\n");
            return 0;
        }
    }
}
else {
    day = pmdays-d_bday+d_now+1;
    if ( m_now > m_bday) {
        month = m_now-m_bday-1;
        if ( y_now >= y_bday ) {
            year = y_now-y_bday;
        }
        else {
            printf("you are not alive\n");
            return 0;
        }
    }
    else {
        month = 11-m_bday+m_now;
        if ( y_now > y_bday ) {
            year = (y_now-y_bday)-1;

        }
        else {
            printf("you are not alive.\n");
            return 0;
        }

    }


}




printf("%d years, %d months, and %d days.\n",year,month,day);
}
int dead() {
    printf("you are not alive");
    return 0;
}