C语言判断今天是今年的第几天2页.doc

C语言判断今天是今年的第几天程序源代码：#includevoid fun()int year,month,day,sum,leap;printf(Input year,month,dayn);scanf(%d%d%d,&year,&month,&day); 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;sum=sum+day;if(yea