三天打魚兩天晒網

中國有句俗語叫 “ 三天打魚兩天晒網 ” 。某人從 1990 年 1 月 1 日起開始 “ 三天打魚兩天晒網 ” ， 問這個人在以後的某一天中是 “ 打魚 ” 還是 “ 曬網 ” 。

#include <stdio.h>#include <stdlib.h>int main(void){int M[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30,31};int Y[4] = {0, 0, 1, 0};int i;int leapyear, sum;int year, month, day;printf("輸入需要查詢的年月日：");scanf("%d%d%d", &year, &month, &day); if (year < 1990 || month > 12 || day > 31) {printf("錯誤的輸入....");exit(-1);}if ((year % 4 == 0 && year % 100 == 0) || year % 400 == 0) {leapyear = 1;if (month == 2 && day > 29) {printf("錯誤的輸入....");exit(-1);}} else {leapyear = 0;if (month == 2 && day > 28) {printf("錯誤的輸入....");exit(-1);}}sum = 0;for (i=1990; i<year; ++i) {if (Y[(i-1990) % 4] == 0 )sum += 365;elsesum += 366;}if (leapyear == 0) M[1] = 29;for (i=1; i<month; ++i)sum += M[i-1];sum += day;sum = sum % 5;if (sum >=1 && sum <=3)printf("打漁\n");elseprintf("曬網\n");return 0;}