万年历 黑框 c++

 基于控制台的万年历的查询系统:

      万年历 黑框 c++_第1张图片

万年历 黑框 c++_第2张图片

#include
#include																	//setw函数所用头文件 

using namespace std;

int judge = 1, loop = 1;																	//一些用到的全局变量 
int mod, start, end, year, month, day, startday;

int dayw(int year, int month, int day) {											//计算星期几的函数(公式计算) 

	if (month <= 2) {

		month += 12;
		year--;
	}
	int w = (day + 2 * month + 3 * (month + 1) / 5 + year + year / 4 - year / 100 + year / 400) % 7;			//公式 
	if (w + 1 == 7)
		w = -1;
	return w + 1;
}

void dw(int year, int month, int day) {												//输出星期几的函数 

	int x = dayw(year, month, day);
	if (x == 1)
		cout << "星期一" << endl;
	if (x == 2)
		cout << "星期二" << endl;
	if (x == 3)
		cout << "星期三" << endl;
	if (x == 4)
		cout << "星期四" << endl;
	if (x == 5)
		cout << "星期五" << endl;
	if (x == 6)
		cout << "星期六" << endl;
	if (x == 0)
		cout << "星期日" << endl;
}

void calendar(int year, int st, int en) {											//输出日历用的函数 

	int i, j, last;
	for (i = st; i <= en; i++) {

		if (i == 2) {

			if (year % 400 == 0 || (year & 4 == 0 && year % 100 != 0))
				last = 29;
			else
				last = 28;
		}
		else if (i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12)
			last = 31;
		else
			last = 30;
		int s, day = 1, jud = 0;
		s = dayw(year, i, 1);
		jud = s;
		cout << endl << i << "月的日历如下:" << endl;

		cout << endl << setw(6) << year << "年" << i << "月" << "1日 ";
		dw(year, i, 1);
		cout << endl;
		cout << "星期日" << setw(6) << "一" << setw(6) << "二" << setw(6) << "三" << setw(6) << "四" << setw(6) << "五" << setw(6) << "六" << endl;//setw函数控制输出格式 
		cout << "------------------------------------------------------" << endl;
		for (j = 1; j <= s; j++)														//用于输出每月第一天前面的空格 
			cout << "      ";
		for (int k = 1; k <= last; k++) {

			cout << setw(6) << k;
			jud++;

			if (jud == 7) {

				jud = 0;
				cout << endl << setw(6);
			}
		}
		cout << endl;
		cout << "------------------------------------------------------" << endl;
	}
}

void welcome1() {																	//首次进入系统输出的欢迎函数 

	cout << endl << endl << endl;
	cout << "      -------------------------------------------" << endl;
	cout << "      *                                         *" << endl;
	cout << "                 欢迎进入万年历查询系统" << endl;
	cout << "      *                      by:贾岱华         *" << endl;
	cout << "      -------------------------------------------" << endl;
	cout << endl;
}

void welcome2() {																	//输出本程序功能的函数 

	cout << endl << endl;
	cout << "请输入您的查询内容:" << endl << endl;
	cout << "                    1.显示一年的日历;" << endl;
	cout << "                    2.显示一月的日历;" << endl;
	cout << "                    3.显示某一天是星期几;" << endl;
	cout << "                    0.退出;" << endl;
	cout << "请选择按键(0~3):" << endl;
}

int wrongyear(int year) {															//输入了错误的年份 

	while (loop) {

		if (year<0) {

			cout << "年份错误,请重新输入:";
			cin >> year;
		}
		else
			return year;
	}
	return  month;
}

int wrongmonth(int month) {														//输入了错误的月份 

	while (loop) {

		if (month>12 || month <= 0) {

			cout << "月份错误,请重新输入:";
			cin >> month;
		}
		else if (month >= 1 && month <= 12)
			return month;

	}
	return month;
}

int wrongday(int day, int year, int month) {									//输入了错误的日期 

	while (loop) {

		if (day>29 && month == 2 && year % 4 == 0 && year % 100 == 0) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else if (day >29 && month == 2 && year % 400 == 0) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else if (day >28 && month == 2) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else if ((month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) && day > 31) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else if (day>30) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else if (day<0) {

			cout << "日期错误,请重新输入:";
			cin >> day;
		}
		else
			return day;
	}
	return day;
}

int main()
{

	while (judge) {

		if (judge == 1) {

			welcome1();
		}
		welcome2();
		cin >> mod;
		judge++;

		if (mod == 0)
			judge = 0;
		else if (mod == 1) {

			cout << endl << "请输入年份:";
			cin >> year;
			year = wrongyear(year);
			calendar(year, 1, 12);
		}
		else if (mod == 2) {

			cout << endl << "请输入年份:";
			cin >> year;
			year = wrongyear(year);

			cout << "请输入月份:";
			cin >> month;

			month = wrongmonth(month);
			calendar(year, month, month);
		}

		else if (mod == 3) {

			cout << "请输入年份:";
			cin >> year;

			year = wrongyear(year);

			cout << "请输入月份(1~12)";
			cin >> month;

			month = wrongmonth(month);

			if (month == 2 && (year % 400 == 0 || (year % 4 == 0 && year % 100 == 0)))
				cout << "请输入此年此月相应的日期(1~29)";
			else if (month == 2)
				cout << "请输入此年此月相应的日期(1~28)";
			else if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
				cout << "请输入此年此月相应的日期(1~31)";
			else
				cout << "请输入此年此月相应的日期(1~30)";

			cin >> day;

			day = wrongday(day, month, year);

			cout << "该天是:";
			dw(year, month, day);
		}

	}

	return 0;
}




万年历 黑框 c++_第3张图片万年历 黑框 c++_第4张图片

你可能感兴趣的:(c++前五章的综合简单运用)