NEXTDAY

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "com_time.h"

#include "com_func.h"

/*

 * Definition of leap year:

Rule 1: A year is called leap year if it is divisible by 400.

For example: 1600, 2000 etc leap year while 1500, 1700 are not leap year.

Rule 2: If year is not divisible by 400 as well as 100 but it is divisible by 4 then that year are also leap year.

For example:  2004, 2008, 1012 are leap year.

*/

int isleapyear(int year)

{

    if ((year%400 == 0) || ((year%4 == 0) && (year%100 != 0))) {

        printf("The year:%d is a leap year!\n",year);

        return 1;

    }

    return 0;

}

int istimelegal(int year, int month, int day){

    if(year <= 0 || year >=3000)

    {

        printf("the year is out of range([0-3000]!\n");

        exit(EXIT_FAILURE);

    }else {

        if(isleapyear(year))

        {

            if(month < 1 || month >12)

            {

                printf("The month of the leap year is out of range\n!");

            }else {

                if(month == 2)

                {

                    if(day > 29)

                    {

                        printf("day:%d is out of range",day);

                        exit(EXIT_FAILURE);

                    }

                }

                else{

                    if((day <= 0) || (day > 31))

                    {

                        printf("day:%d is out of range",day);

                        exit(EXIT_FAILURE);

                    }

                }

            }

        }else {//not leap year

            if(month == 2)

            {

                if(day > 28)

                {

                    printf("The month:%d of the year is out of range\n!",month);

                    exit(EXIT_FAILURE);

                }

            }else {

                if((day <= 0) || (day > 31))

                {

                    printf("day:%d is out of range",day);

                    exit(EXIT_FAILURE);

                }

            }

        }

    }

    return 1;

}

//2016-05-02

char *nextday(char *date)

{

    int days[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};

    char str_year[5]={0};

    char str_month[3]={0};

    char str_day[3]={0};

    int year=0;

    int month=0;

    int day=0;

    //strncpy();

    sscanf(date,"%4s-%2s-%2s",str_year,str_month,str_day);

    /*printlog(str_year);

    printlog(str_month);

    printlog(str_day);

    printf("%s-%s,%s%s,%s,%s\n",str_year,str_month,str_day);*/

    year = atoi(str_year);

    month = atoi(str_month);

    day = atoi(str_day);

    //printf("day:%d-%d-%d\n",year, month, day);

    if(isleapyear(year))

    {

        days[2] = 29;

    }

    else {

        days[2] = 28;

    }

    //judge time illegal or not

    istimelegal(year,month,day);

    int i = 0;

    int tmp = 0;

    tmp = month;

    for(i = 1;i < 13;i++)

    {

        if(tmp != i)

        {

            continue;

        }else {

            if(day < days[i])

            {

                printlog("&&&&&&&&&&");

                day++;

            }else if(day == days[i]){

                printlog("0000000");

                month++;

                if(month > 12)

                {

                    printlog("121212122");

                    year++;

                    month %= 12;

                }

                printlog("********");

                day = 1;

            }else {

                printlog("@@@@@@@@@@");

                break;

            }

            /*printlog("&&&&&&&&&&");

            day++;

            printlog("@@@@@@@@@@");*/

        }

    }

    //printf("day:%d-%d-%d\n",year, month, day);

    sprintf(date, "%4d-%0d-%0d", year, month, day);

    //printlog(date);

    //printf("%s\n",date);

    return date;

}
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int main(int argc, char *argv[])

{

    //char date[]="2016-03-31";

    //char date[]="2016-02-29";

    //char date[]="2016-03-09";

    //char date[]="2016-12-31";

    //char date[]="2015-03-31";

    char date[]="2015-02-29";

    //char date[]="2015-03-09";

    //char date[]="2015-12-31";

    //printf("%d\n",isleapyear(2015));

    nextday(date);

    printlog(date);

    return 0;

}