1850: 判断第几天

解题思路:switch累加

注意事项:重复使用：while(scanf("%d/%d/%d",&year,&month,&day)!=EOF){ 算法代码 } 

参考代码:

#include <stdio.h>
int main() {
	int year,month,day,total;
	while(scanf("%d/%d/%d",&year,&month,&day)!=EOF) {
		total=0;
		total+=day;
		switch(month-1) {
			case 11:
				total+=30;
			case 10:
				total+=31;
			case 9:
				total+=30;
			case 8:
				total+=31;
			case 7:
				total+=31;
			case 6:
				total+=30;
			case 5:
				total+=31;
			case 4:
				total+=30;
			case 3:
				total+=31;
			case 2:
				total+=28;
			case 1:
				total+=31;
		}
		if(year%400==0||year%4==0&&year%100!=0)
			if(month>2)
				total++;
		printf("%d\n",total);
	}
}