题解 | 获得月份天数

#include <stdio.h>

int main() {
    int year = 0;
    int month = 0;
    while (scanf("%d %d", &year, &month) != EOF) 
    {
        int arr[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            arr[2] = 29;
        }
        printf("%d\n", arr[month]);
       
    }
     return 0;

}