#include <stdio.h> void day(int year, int month) { int arr[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; //闰年月份天数 int brr[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; //平年月份天数 if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) printf("%d\n", arr[month - 1...