建民打卡日记4.16

一、问题描述

某人从1990年一月一日开始“三天打鱼两天晒网”，问某天以后是打鱼还是晒网？

二、设计思路

1.输入日期

2.求1990年一月一日到该日期天数

3.对天数求余，根据余数输出“打鱼”或“晒网”

三、程序流程图

四、代码实现

#include <iostream>
using namespace std;

int runYear(int year) {
	if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
		return 1;
	else
		return 0;
}

int countDay(int y, int m, int d) {
	int perMonth[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int totalDay = 0, year, i;
	for (year = 1990; year < y; year++) {
		if (runYear(year))
			totalDay = totalDay + 366;
		else
			totalDay = totalDay + 365;
	}
	if (runYear(y))
		perMonth[2]++;
	for (i = 1; i < m; i++) {
		totalDay += perMonth[i];
	}
	totalDay += d;
	return d;

}

int main() {
	int year, month, day;
	cin >> year >> month >> day;
	int totalDay;
	int result;
	totalDay = countDay(year, month, day);
	result = totalDay % 5;
	if (result > 0 && result < 4)
		printf("今天打鱼");
	else
		printf("今天晒网");
}