C++实现万年历小功能

 #include #include #include using namespace std; int number;       //菜单键 int year, month, day;   //年、月、日 int i, j, t;       //for循环用的量 int s;          //星期X char c;         //存放随机输入的数字，以实现“按任意键返回主菜单”的功能 char months[] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };   //平年每个月的天数 void Pos(int x, int y);   //光标位置 void menu();        //主菜单函数 void runnian();       //如是闰年则变第二个月天数28为29 void oneyear();       //输出一整年的年历 void onemonth();      //输出一个月的月历 void xianshiweek();     //显示星期数 void Pos(int x, int y)//光标位置 { COORD pos; HANDLE hOutput; pos.X = x; pos.Y = y; hOutput = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleCursorPosition(hOutput, pos); } void menu()//主菜单函数 { Pos(40, 3); cout << "***********************************" << endl; Pos(40, 4); cout << "*     欢迎使用万年历     *" << endl; Pos(40, 5); cout << "*     ---made by pjr     *" << endl; Pos(40, 6); cout << "***********************************" << endl; Pos(20, 8); cout << "操作键：" << endl; Pos(20, 9); cout << "1.显示一年的年历" << endl; Pos(20, 10); cout << "2.显示一月的月历" << endl; Pos(20, 11); cout << "3.显示某一天是星期几" << endl; Pos(20, 12); cout << "0.退出" << endl; Pos(20, 14); cout << "请输入操作键(0~3):"; cin >> number; if (number <0 || number>3) { system("cls"); Pos(20, 15); cout << "输入数字无效,请重新输入!" << endl; menu(); } } void runnian()   //如是闰年则变第二个月天数28为29 { cin >> year; if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))   //闰年判断公式 { months[2] = 29; } } void oneyear()   //输出一整年的年历 { cout << "请输入年份："; runnian(); system("cls");   //清屏 cout << "请输入年份：" << year << endl << endl; s = (year - 1 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + 1) % 7;   //该年1月1日的星期数 for (i = 1; i <= 12; i++) { cout << i << "月份的月历如下:" << endl; cout << setw(6) << "日" << setw(6) << "一" << setw(6) << "二" << setw(6) << "三" << setw(6) << "四" << setw(6) << "五" << setw(6) << "六" << endl; for (j = 0; j > c; system("cls"); menu(); } void onemonth()//输出一个月的月历 { int s = 0; cout << "请输入年份："; runnian(); cout << "请输入月份："; cin >> month; system("cls"); cout << "请输入年份：" << year << endl << endl; cout << "请输入月份：" << month << endl << endl; for (i = 1; i <= month - 1; i++) { s = s + months[i];   //该年1月1日到所求日期前一天的天数 } s = (year - 1 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + 1 + s) % 7;   //所求日期的星期数 cout << month << "月份的月历如下:" << endl; cout << setw(6) << "日" << setw(6) << "一" << setw(6) << "二" << setw(6) << "三" << setw(6) << "四" << setw(6) << "五" << setw(6) << "六" << endl; for (j = 0; j > c; system("cls"); menu(); } void xianshiweek()   //显示星期数 { int s = 0; cout << "请输入年份："; runnian(); cout << "请输入月份："; cin >> month; cout << "请输入日期："; cin >> day; system("cls"); cout << "请输入年份：" << year << endl << endl; cout << "请输入月份：" << month << endl << endl; cout << "请输入日期：" << day << endl << endl; for (i = 1; i <= month - 1; i++) { s = s + months[i]; } s = (year - 1 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + day + s) % 7; cout << "显示的星期数如下:" << s << endl; cout << endl; cout << "请按任意键返回主界面:"; cin >> c; system("cls"); menu(); } int main()//主函数 { setlocale(LC_ALL, "chs");//转中文 menu(); while (number != 0) { switch (number) { case 1: { oneyear(); break; } case 2: { onemonth(); break; } case 3: { xianshiweek(); break; } } months[2] = 28; //把months[2]变为初值 } if (number == 0) { system("pause"); } return 0; }