全年日历
本来想用 Python 写的，但 Python 本身就有模组 calendar，所以就用 C++ 写了。代码随便写的，有点乱，见笑了 {:10_269:} {:10_269:}
输出结果如图：
代码：#include <iostream>
#include <array>
#include <iomanip>
#include <vector>
// 判断闰年
auto isLeapYear = [](int year)->bool {return (not(year % 4) and (year % 100)) or (not (year % 400)); };
using std::array, std::vector;
using std::ostream, std::operator<<;
class Calendar {
friend ostream& operator<<(ostream&, const Calendar&);
public:
unsigned year; // 年份
unsigned dweek; // 年份的第一天是星期几？
vector<array<array<int, 7>, 6>> fullCalendar; // 完整一年份日历表，共 12 个月、每个月 6 行、每行 7 天
Calendar() {
this->year = 1900; // 未设定年份，默认为 1900 年
this->calculate(); // 初始化成员
}
Calendar(unsigned year) {
this->year = year;
this->calculate(); // 初始化成员
}
inline array<array<int, 7>, 6> calendar(int, int); // 月份历表
inline void calculate(); // 初始化成员函数
};
// 重载输出
using std::string, std::endl;
ostream& operator<<(ostream& os, const Calendar& cld) {
string month = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "Octorber", "November", "December" };
vector<string> week{ "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
os << std::setfill('-') << std::setw(104) << "" << endl <<std::setfill(' ') << std::setw(52) << cld.year << " Calendar" << endl << std::setfill('-') << std::setw(104) << "" << endl;
// 打印全月份，每 3 个月为一行
for (int M = 1; M < 12; M += 3) {
// 每个月共 6 行
for (int line = 0; line < 6; ++line) {
if (not line) {
for (int m = M; m < M + 3; ++m) os << std::setfill(' ') << std::setw(28) << month << std::setfill(' ') << std::setw(10) << "";
os << endl;
for (int m = M; m < M + 3; ++m) os << std::setfill('-') << std::setw(28) << "" << std::setfill(' ') << std::setw(10) << "";
os << endl;
for (int m = M; m < M + 3; ++m) {
for (const string& str : week) os << std::setfill(' ') << std::setw(4) << str;
os << std::setfill(' ') << std::setw(10) << "";
}
os << endl;
for (int m = M; m < M + 3; ++m) os << std::setfill('-') << std::setw(28) << "" << std::setfill(' ') << std::setw(10) << "";
os << endl;
}
for (int m = M; m < M + 3; ++m) {
for (int day : cld.fullCalendar) {
if (day) os << std::setfill(' ') << std::setw(4) << day;
else os << std::setfill(' ') << std::setw(4) << "";
}
os << std::setfill(' ') << std::setw(10) << "";
}
os << endl;
}
os << endl;
}
return os;
}
// 月份历表
array<array<int, 7>, 6> Calendar::calendar(int dweek, int tdays) {
array<array<int, 7>, 6> res;
res.fill({ {0} });
for (int i = dweek, day = 1; day <= tdays; ++i, ++day) res = day;
return res;
}
// 初始化成员
void Calendar::calculate() {
int days = 0;
for (int year = 1900; year < static_cast<signed>(this->year); ++year) {
days += isLeapYear(year) ? 366 : 365;
}
this->dweek = days % 7 + 1;
for (int m = 1, tdays, d = this->dweek; m <= 12; ++m) {
// 计算每个月的天数 tdays
if (m == 2) tdays = isLeapYear(this->year) ? 29 : 28;
else if (m < 8) tdays = m & 1 ? 31 : 30;
else tdays = m & 1 ? 30 : 31;
// 赋值每个月的历表
(this->fullCalendar).push_back(this->calendar(d, tdays));
// 每个月的第一天是星期几？
d += tdays;
d %= 7;
}
}
using std::cout;
int main(void) {
Calendar A(2022);
cout << A << endl;
return 0;
} {:10_275:}
柿子饼同学 发表于 2022-7-6 07:36
{:10_257:} {:10_275:} 让我想起了wttr.in这个网站 观摩学习一下 {:5_108:} {:10_275:}
输出格式很好看不乱，代码写的也很干净工整 良作
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