#include <stdio.h>int main(){ int year, m, d,x; printf("请输入年月日"); scanf_s("%d%d%d", &year, &m, &d); if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { switch (m) { case 1:x = 0; break; case 2:x = 31; break; case 3:x = 60; break; case 4:x = 91; break; case 5:x = 121; break; case 6:x = 152; break; case 7:x = 182; break; case 8:x = 213; break; case 9:x = 244; break; case 10:x = 274; break; case 11:x = 305; break; case 12:x = 335; break; } } else { switch (m) { case 1:x = 0; break; case 2:x = 31; break; case 3:x = 59; break; case 4:x = 90; break; case 5:x = 120; break; case 6:x = 151; break; case 7:x = 181; break; case 8:x = 212; break; case 9:x = 243; break; case 10:x = 273; break; case 11:x = 304; break; case 12:x = 334; break; } } printf("第%d天", x + d); return 0;}