一道基础的根据日期求星期问题,各位
#include <stdio.h>
#include<math.h>
int main()
{
int year,month,date,days=0,out,flag=0,i;
scanf("%d %d %d",&year,&month,&date);
for(i=1900;i<year;i++){
if(i%400==0||(i%4==0&&i%100!=0))
flag=1;
if(flag==1)
days+=366;
else
days+=365;}
if(i==year){
switch(month){
case1:days+=0;break;
case2:days+=31;break;
case3:days+=31+28;break;
case4:days+=31+28+31;break;
case5:days+=31+28+31+30;break;
case6:days+=31+28+31+30+31;break;
case7:days+=31+28+31+30+31+30;break;
case8:days+=31+28+31+30+31+30+31;break;
case9:days+=31+28+31+30+31+30+31+31;break;
case10:days+=31+28+31+30+31+30+31+31+30;break;
case11:days+=31+28+31+30+31+30+31+31+30+31;break;
case12:days+=31+28+31+30+31+30+31+31+30+31+30;break;
}
if((year%400==0||(year%4==0&&year%100!=0))&&month>=3)
days++;
days+=date-1;
}
out=days%7;
if(out==7){
printf("%d\n",7-out);
}else
printf("%d\n",out);
return 0;
}
麻烦看看哪里有问题