//確定母親節 #include <stdio.h> #include <stdlib.h> int months[2][13] = {{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, //非閏年的12個月{ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } //閏年的12個月 }; int isLeap(int year); int main() {int base_year = 1900;int base_first_day = 1;int years, days;printf("year: ");scanf("%d/%d", &years);for(int i = base_year; i < years; i++){if(isLeap(i))days += 366;elsedays += 365;}for (int i = 1; i < 5; i++) days += months[isLeap(years)][i];int dayofwork, motherday;dayofwork = days % 7;motherday = 14 - dayofwork;printf("%d年5月%d號是母親節\n", years, motherday);return 0; } int isLeap(int year) //判斷是否為閏年 {return year % 4 == 0 && year % 100 != 0 || year % 400 == 0; }

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