个回答

• Ecobb

  2016-10-23 00:06:42

  已采纳

  int sum,flag;

  switch(month)

  {

  case 1:sum=0;break;

  case 2:sum=31;break;

  case 3:sum=59;break;

  case 4:sum=90;break;

  case 5:sum=120;break;

  case 6:sum=151;break;

  case 7:sum=181;break;

  case 8:sum=212;break;

  case 9:sum=243;break;

  case 10:sum=273;break;

  case 11:sum=304;break;

  case 12:sum=334;break;

  default: printf("date error!");

      }

      sum=sum+day;

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

      {

          flag=1;

      }  

      else

      {

          flag=0;

      }

      if(flag==1&&month>2)

      sum++;

  printf("%d年%d月%d日是该年的第%d天",year,month,day,sum);

  
  

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