#include<stdio.h> int leap(int a) { if(a%4==0&&a%100!=0||a%400==0) return 1; else return 0; } int number(int year,int m,int d) { int sum=0,i,j,k,a[12]={31,28,31,30,31,30,31,31,30,31,30,31}; int b[12]={31,29,31,30,31,30,31,31,30,31,30,31}; if(leap(year)==1) for(i=0;i<m-1;i++) sum+=b[i]; else for(i=0;i<m-1;i++) sum+=a[i]; sum+=d; return sum; } void main() { int year,month,day,n; printf("请输入年月日 "); scanf("%d%d%d",&year,&month,&day); n=number(year,month,day); printf("第%d天 ",n); }