124 lines
3.5 KiB
C
124 lines
3.5 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 isLeapYear(int year) {
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return (year % 4 == 0 && year % 100!= 0) || (year % 400 == 0);
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}
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// 计算某月有多少天
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int daysInMonth(int year, int month) {
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int days[] = {31, 28 + isLeapYear(year), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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return days[month - 1];
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}
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// 计算1900年1月1日到给定日期的总天数
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int totalDays(int year, int month, int day) {
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int total = 0;
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int y;
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for (y = 1900; y < year; y++) {
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total += 365 + isLeapYear(y);
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}
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int m;
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for (m = 0; m < month; m++) {
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total += daysInMonth(year, m);
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}
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total += day;
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return total;
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}
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// 打印日历
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void printCalendar(int year, int singleColumn) {
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int startDay = (totalDays(year, 1, 1) + 1) % 7;
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printf("Calendar - %d\n", year);
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if (singleColumn) {
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int month;
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for ( month = 1; month <= 12; month++) {
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int days = daysInMonth(year, month);
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printf("\n\t%d月\n", month);
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printf("\tMon\tTue\tWed\tThu\tFri\tSat\tSun\n");
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int i;
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for (i = 0; i < startDay; i++)
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printf("\t");
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int day;
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for (day = 1; day <= days; day++) {
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printf("\t%d", day);
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if ((startDay + day) % 7 == 0)
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printf("\n");
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}
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if ((startDay + days) % 7!= 0)
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printf("\n");
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startDay = (startDay + days) % 7;
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}
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} else {
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printf("\tMon\tTue\tWed\tThu\tFri\tSat\tSun\t\tMon\tTue\tWed\tThu\tFri\tSat\tSun\n");
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int month;
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for (month = 1; month <= 12; month++) {
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int days = daysInMonth(year, month);
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int currentStartDay = (totalDays(year, month, 1) + 1) % 7;
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int i;
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for (i = 0; i < currentStartDay; i++)
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printf("\t");
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int day;
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for (day = 1; day <= days; day++) {
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printf("\t%d", day);
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if ((currentStartDay + day) % 7 == 0)
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printf("\t\t");
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}
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printf("\n");
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}
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}
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}
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// 查询某日期是周几
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void queryDay() {
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int year, month, day;
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printf("请输入日期(年 月 日)：");
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scanf("%d %d %d", &year, &month, &day);
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int total = totalDays(year, month, day);
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int weekDay = (total - 1) % 7;
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char *weekDays[] = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat","Sun"};
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printf("%d年%d月%d日是 %s\n", year, month, day, weekDays[weekDay]);
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printf("该年是 %s年\n", isLeapYear(year)? "闰" : "平");
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}
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// 菜单
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void menu() {
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int choice;
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int year;
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int singleColumn = 1;
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while (1) {
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printf("\n1. 查询某日期是周几并判断是否为闰年\n");
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printf("2. 打印某一年的日历(单列)\n");
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printf("3. 打印某一年的日历(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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scanf("%d", &choice);
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switch (choice) {
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case 1:
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queryDay();
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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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scanf("%d", &year);
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printCalendar(year, singleColumn);
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break;
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case 3:
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singleColumn = 0;
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printf("请输入年份：");
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scanf("%d", &year);
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printCalendar(year, singleColumn);
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singleColumn = 1;
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break;
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case 4:
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exit(0);
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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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}
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}
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}
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int main() {
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menu();
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return 0;
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}
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