题解 | #计算日期到天数转换#

#include <stdbool.h>
#include <stdio.h>

bool isLuner(int year)
{
    if (year%4==0 && year%100!=0) {
        return true;
    } else if (year%400 == 0) {
        return true;
    } else {
        return false;
    }
}

int days[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
int daysL[12] = {31,29,31,30,31,30,31,31,30,31,30,31};

int main() {
    int year, month, day,i;
    int result;

    while (scanf("%d %d %d", &year, &month, &day) != EOF) {
        result = 0;
        for (i=0; i<month-1; ++i) {
            if (isLuner(year)) result += daysL[i];
            else  result += days[i];
        }
        result += day;
        printf("%d", result);
    }
    return 0;
}