125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
#include <stdio.h>
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// 判断闰年
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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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// 计算给定日期是周几（蔡氏公式）
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int dayOfWeek(int year, int month, int day)
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{
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if (month < 3) {
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year--;
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month += 12;
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}
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int c = year / 100;
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int y = year % 100;
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int d = (day + (13 * (month + 1) / 5) + y + (y / 4) + (c / 4) + (5 * c)) % 7;
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return d;
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}
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// 输出单列日历
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void printSingleColumnCalendar(int year) {//printSingleColumnCalendar打印单个月日历空间
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char *months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
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int daysInMonth[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//储存一年每月的天数
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if (isLeapYear(year)) {
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daysInMonth[1] = 29;//特殊年份
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}
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for (int m = 0; m < 12; m++) {//输出一年的月份
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printf("%s %d\n", months[m], year);
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printf("Sun Mon Tue Wed Thu Fri Sat\n");
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int weekDay = dayOfWeek(year, m + 1, 1);
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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 d = 1; d <= daysInMonth[m]; d++) {
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printf("%3d ", d);
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if ((weekDay + d) % 7 == 0) {
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printf("\n");
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}
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}
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printf("\n\n");
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}
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}
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// 输出双列日历
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void printDoubleColumnCalendar(int year) {//printDoubleColumnCalendar打印并排月的日历
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char *months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
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int daysInMonth[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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if (isLeapYear(year)) {
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daysInMonth[1] = 29;
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}
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for (int m = 0; m < 12; m++) {
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printf("%s %d\t\t", months[m], year);
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if (m % 2 == 0) {
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printf("\n");
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}
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printf("Sun Mon Tue Wed Thu Fri Sat\t\tSun Mon Tue Wed Thu Fri Sat\n");
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int weekDay = dayOfWeek(year, m + 1, 1);
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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 d = 1; d <= daysInMonth[m]; d++) {
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printf("%3d ", d);
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if ((weekDay + d) % 7 == 0) {
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printf("\n");
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}
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}
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printf("\n\n");
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}
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}
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// 菜单显示
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void menu() {
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int choice, year,a;
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printf("1.输出对应年份全年的日历：\n");
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printf("2.判断输入年份是否为闰年：\n");
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printf("3.对应日期为周几：\n");
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printf("4.退出：\n");
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scanf("%d",&a);
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if(a==1)
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{
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printf("1. 输出单列日历\n2. 输出双列日历\n3. 退出\n: ");
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scanf("%d", &choice);
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if (choice == 1 || choice == 2) {
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printf("请输入年份: ");
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scanf("%d", &year);
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if (year < 1900 || year > 2100) {//报错范围
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printf("年份超出范围，请重新输入\n");
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menu();
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return;
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}
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if (choice == 1) {
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printSingleColumnCalendar(year);//选择单列
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} else {
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printDoubleColumnCalendar(year);//选择双列
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}
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} else if (choice == 3) {
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return;
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} else {
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printf("无效选择，请重新选择\n");
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menu();
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}
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}
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else if(a==2)
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{
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printf("请输入年份：\n");
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scanf("%d",&year);
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if((year % 4 == 0 && year % 100!= 0) || year % 400 == 0)
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printf("闰年");
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else
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printf("平年");
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}
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else if(a==3)
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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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} |