输入年月日，求这一年已经过了几天，我这个输出只有日算进去的天数

Question

```c

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b,c,i,feb=28;
    int sum = 0;
    scanf("%d-%d-%d",&a,&b,&c);

    if((a % 4==0 && a % 100 != 0)||(a % 400==0)){
            feb = 29;
        for(i = 1;i < b;i++){
            if (i == 1||i == 3||i == 5||i == 7||i == 8||i == 10||i == 12) {
                sum = sum + 31;
            }else if (i = 2) {
                sum = sum + feb;
            }else if (i == 4||i == 6||i == 9||i == 11) {
                sum = sum + 30;
            }
        }
    }
    printf("%d",sum + c);

    return 0;
}

```

Answer 1

参考：

#include <stdio.h>
int main()
{
    int year,mon,day;
    int i,sum = 0;
    int arr[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    scanf("%d,%d,%d",&year,&mon,&day);
    if(year%4==0 && year%100 != 0 || year%400 == 0)
        arr[2] = 29;
    for (i=0;i<mon;i++)
    {
        sum += arr[i];
    }
    sum += day;
    printf("%d年%d月共有%d天\n",year,mon,arr[mon]);
    printf("%d年%d月%d日是今年的第%d天\n",year,mon,day,sum);
    return 0;
}