snoopykitten

#include <stdio.h>
#include <stdlib.h>

int leap(int x){
    if(x%4 == 0 && x%100 != 0 || x%400 == 0)
        return 1;
    else
        return 0;
}

int pastDays(int m, int d, int y){
    int days[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    int i, past = 0;

    if(leap(y)){
        days[1] = 29;
    }

    for(i = 0; i < m-1; i++){
        past = past + days[i];
    }
    return past + d;
}

int daysPast(int d, int y) {
    int days[] = {31,28,31,30,31,30,31,31,30,31,30,31};

    int i, temp = 0;

    if(leap(y)){
        days[1] = 29;
    }

    for(i = 0; i < 11 && d > days[i]; i++){
        d = d - days[i];
    }

    if(d < 0){
        d = days [i] + d;
    }
    printf("\n\t\t%d/%d/%d", i+1,d, y);

}

int main()
{
    int choice, past, mm, dd, yy, temp;
    char more;
    printf("\n\t\tThis program will find days past or date in the year");

    do{
        printf("\n\t\t1)  date      -> days past");
        printf("\n\t\t2)  days past -> date");
        printf("\n\t\tYour choice (1/2)?");
        scanf("%d", &choice);
        if(choice == 1){
            printf("\n\t\tInput date (mm/dd/yyyy)");
            scanf("%d/%d/%d", &mm, &dd, &yy);
            if(mm > 12) {
                printf("\n\t\tThere are not more than 13 months in a year");
            }
            else if(dd > 31){
                printf("\n\t\tCant have more than 31 days in a month");
            }
            else if(mm == 2 && dd > 28 && leap(yy) != 1 || mm == 2 && dd > 29 && leap(yy) == 0){
                printf("\n\t\tThere are not more than 28 day in February %d", yy);
            }
            else{
                printf("\n\t\tThere are %d days past in the year", pastDays(mm, dd, yy));
            }
        }
        else if(choice == 2) {
            printf("\n\t\tInput days past (ddd)");
            scanf("%d", &past);
            printf("\n\t\tInput the year (yyyy)");
            scanf("%d", &yy);
            if(past == 366 && leap(yy) == 0){
                printf("\n\t\tError there's not 366 days in %d", yy);
            }
            else if(past > 365) {
                yy = yy + 1;
                past = past - 365;
                daysPast(past, yy);
            }
            else if(past < 0){
                yy = yy -1;
                past = 365 + past;
                daysPast(past, yy);
            }
            else{
                daysPast(past, yy);
            }
        }

        printf("\n\t\tDo more (Y/N)");
        scanf("%s", &more);
    }while(more == 'y' || more == 'Y');


    return 0;
}