c语言问题 输入年月日,输出是当年的第几日,返回值不对 为什么答:include <stdio.h> void main(){ int year,month,day;int dayofyear(int year,int month,int day);printf("Please input the date:\n");scanf("%d%d%d",&year,&month,&day);int n=dayofyear(year,month,day);printf("%d day\n",n);} dayofyear(int year,int month,int day){ int k...