题解 | #获得月份天数#

#include <stdio.h>

int getdays(int year, int month) {
    int days;
    int month_ori[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    days = month_ori[month];
    if (month == 2) {
        if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
            days++;
    }

    return days;
}

int main() {
    int y, m;
    while (scanf("%d %d", &y, &m) != EOF) {
        printf("%d\n",getdays(y,m));
    }
    return 0;
}