144 lines
3.2 KiB
C++
144 lines
3.2 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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// 判断是否为闰年
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int runnian(int year) {
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return ((year % 4 == 0 && year % 100!= 0) || (year % 400 == 0));
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}
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// 计算某日期是周几（基姆拉尔森计算公式）
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int howweek(int year, int month, int day) {
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if (month < 3) {
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month += 12;
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year--;
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}
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int week = (day + 2 * month + 3 * (month + 1) / 5 + year + year / 4 - year / 100 + year / 400) % 7;
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return week+1;
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}
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// 输出单个月份日历（单列输出）
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void dl(int year, int month) {
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int dym;
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if (month == 2) {
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dym = runnian(year)? 29 : 28;
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} else if (month == 4 || month == 6 || month == 9 || month == 11) {
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dym = 30;
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} else {
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dym = 31;
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}
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int weekDay = howweek(year, month, 1);
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if(weekDay==7)
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weekDay=0;
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printf(" %d年%d月\n", year, month);
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printf(" 日 一 二 三 四 五 六\n");
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for (int i = 0; i < weekDay; i++) {
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printf(" ");
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}
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for (int i = 1; i <= dym; i++) {
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printf("%2d ", i);
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if ((i + weekDay) % 7 == 0) {
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printf("\n");
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}
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}
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printf("\n");
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}
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// 输出整年日（单列输出）
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void dl(int year) {
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if(year<=10000&&year>0){
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for (int month = 1; month <= 12; month++) {
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dl(year, month);
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}
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}
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else
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printf("错误");
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}
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// 显示菜单
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void cd() {
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printf("1. 查询日期是周几及是否闰年\n");
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printf("2. 输出单年日历（单列）\n");
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printf("3. 输出单年日历（双列）\n");
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printf("4. 退出\n");
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printf("请选择操作：");
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}
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int getValidIntInput() {
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int input;
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while (1) {
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if (scanf("%d", &input) == 1) {
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break;
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} else {
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printf("输入错误，请重新输入整数：");
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while (getchar()!= '\n');
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}
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}
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return input;
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}
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int main() {
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int choice;
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int year, month, day;
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do {
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cd();
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choice = getValidIntInput();
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switch (choice) {
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case 1:
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printf("请输入年份：");
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year = getValidIntInput();
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printf("请输入月份：");
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month = getValidIntInput();
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printf("请输入日期：");
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day = getValidIntInput();
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printf("%d年%d月%d日是星期", year, month, day);
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switch (howweek(year, month, day)) {
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case 0:
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printf("日");
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break;
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case 1:
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printf("一");
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break;
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case 2:
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printf("二");
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break;
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case 3:
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printf("三");
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break;
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case 4:
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printf("四");
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break;
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case 5:
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printf("五");
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break;
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case 6:
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printf("六");
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break;
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}
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printf("，");
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if (runnian(year)) {
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printf("该年是闰年\n");
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} else {
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printf("该年不是闰年\n");
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}
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break;
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case 2:
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printf("请输入年份：");
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year =getValidIntInput();
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dl(year);
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break;
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case 4:
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printf("退出程序\n");
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break;
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default:
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printf("无效的选择，请重新选择\n");
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break;
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}
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} while (choice!= 4);
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return 0;
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}
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