用c语言中的数组编程,当填写年月日时,输出是这年的第几天.答:printf("%d-%d-%d是这年的第%d天.\n\n",year,month,day,sum);} else printf("\tData errors!!!\n\n");}while(1);} 方法二:include<stdio.h> include <stdlib.h> struct { int year;int month;int day;}date;void main(){int i,days;int day_tab[13]={0,31,28,31,30,31...