c语言

'C;break;\rcase6:grade='D';break;\rcase5:\rcase4:\rcase3:\rcase1:\rcase0:grade='E;\r)\rprintf("ƒìTð5.1f,vuHñòTðc\n\n",score,grade);\r)\r13,P108ç5.5(2˜óôõ?lö)ç5.6(l÷ø)\r5.5\r#include<stdio.h>\rvoidmain()\r{\rintyear,leap;\rscanf("%d",&year);\rif(year%4==0)\r(\rif(year%100==0)\r(\rif(year%400==0)\rleap=1;\relse\rleap=0;\r)\relse\rleap=1;\r)\relse\rleap=0;\rif(leap)\rprintf("%dis",year);\relse\rprintf("%disnot",year);EvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\rprintf("aleapyearAn")\r)\r5.6\r14,P31ç2.17ç2.18\r2.17\rP`50:êëAƒìùú80‘Hêûƒì\r2.18\rP`2000HrH2500ø¦2øTµ÷ø\r#include<stdio.h>\rvoidmain()\r(\rintyear;\ryear=2000;\rgo:if(((year%4==0)&&(year%100!=0))||(year%400==0))\rprintf("%disrunnian",year);\rif(year<=2500)\ryear=year++;\rif(year>2500)\rgotoend;\rgotogo;\rend:getch();