算天数

r;

publicclasstianshu{

intyear=0;

intmonth=0;

intday=0;

privateintsum=0;

publictianshu(intyear,intmonth,intday){

=year;

=month;

=day;

}

publicintsumday(){

if(month==1){

returnsum=day;

}el{

for(inti=1;i

sum=sum+isday(year,i);

}

sum=sum+day;

}

returnsum;

}

publicintisday(intyear,intmonth){

switch(month){

ca1:ca3:ca5:ca7:

ca8:ca10:ca12:

return31;

ca2:

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

return29;

}el{

return28;

}

default:return30;

}

}

/**

*@paramargs

*/

publicstaticvoidmain(String[]args){

for(inttime=0;;time++){

Scannersc=newScanner();

n("请输入年份：");

intyear=t();

n("请输入月份：");

intmonth=t();

n("请输入日期：");

intday=t();

tianshuts=newtianshu(year,month,day);

();

n(+"年"++"月"++"日

是这一年的第"++"天");

}

}

}