【程序14】
题目:输入某年某月某日,判断这一天是这一年地第几天?
#include<stdio.h>
int main(){int year,m1,d1,num=0;scanf("%d,%d,%d",&year,&m1,&d1);int m=1,d=1;while(m<m1||d<=d1){if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){if(d==31){m++;d=0;}}if(m==4||m==6||m==9||m==11){if(d==30){m++;d=0;}}if(m==2){if(year%400==0||(year%4==0&&year%100!=0)){if(d==29){m++;d=0;}}else{if(d==28){m++;d=0;}}}d++;num++;}printf("%d\n",num);return 0;
}