计算日期到天数转换

#include 

int main() 
{
    
    int year = 0;
    int month = 0;
    int day = 0;

    scanf("%d %d %d",&year,&month,&day);
    int arr[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};

    int sum = 0;
    for(int i = 0; i2)
    {
        sum++;
    }

    printf("%d",sum);
    return 0;
}