日期转换

printf("请输入查询方式\n");

    printf("输入1：表示查询第几天(输入年月日)\n");

    printf("输入2：表示查询具体的日期（输入年和天数）\n");

    int n=2, year=2001,month=12,day=31,dayOfTheYear=4;

    int numOfMonth[12]={31,29,31,30,31,30,31,31,30,31,30,31};

    int numOfMonth1[12]={31,28,31,30,31,30,31,31,30,31,30,31};

    

    //scanf("%d",&n);

    if (n==1)

    {

        printf("请输入年月日\n");

        scanf("%d %d %d",&year,&month,&day);

        int a=0;



        if ([self isRN:year])

        {

            for (int i=0; i<month-1; i++)

            {

                a+=numOfMonth[i];

            }

            a+=day;

        }

        else        {

            for (int i=0; i<month-1; i++)

            {

                a+=numOfMonth1[i];

            }

            a+=day;

        }

        printf("%d年%d月%d日是这一年的第%d天",year,month,day,a);

    }

    else  if(n==2)

    {

        //printf("请输入年和第几天");

       // scanf("%d %d ",&year,&dayOfTheYear);

        if ([self isRN:year])

        {

            int a=0;



            for (int i=0; i<12; i++)

            {

                if (dayOfTheYear<31)

                {

                    printf("%d第%d天是这一年的1月%d日",year, dayOfTheYear,dayOfTheYear);

                    break;

                }

                a+=numOfMonth[i];

                if (dayOfTheYear>a&&dayOfTheYear<=(a+numOfMonth[i+1]))

                {

                    printf("%d第%d天是这一年的%d月%d日",year, dayOfTheYear,i+2,(dayOfTheYear-a));

                    break;

                }

            }

        }

        else

        {int a=0;

            

            for (int i=0; i<12; i++)

            {

                if (dayOfTheYear<31)

                {

                    printf("%d第%d天是这一年的1月%d日",year, dayOfTheYear,dayOfTheYear);

                    break;

                }

                a+=numOfMonth1[i];

                if (dayOfTheYear>a&&dayOfTheYear<=(a+numOfMonth1[i+1]))

                {

                    printf("%d第%d天是这一年的%d月%d日",year, dayOfTheYear,i+2,(dayOfTheYear-a));

                    break;

                }

            }

        }

    }