349 lines
7.9 KiB
C++
349 lines
7.9 KiB
C++
#include "stdio.h"
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#include "stdlib.h"
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//判断闰年
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int isLeapYear(int year)
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{
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if(year%400==0||(year%100!=0&&year%4==0))
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{
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return 1;
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}
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return 0;
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}
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// 计算某年某月的天数
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int daysInMonth(int year, int month)
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{
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int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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if (month == 2 && isLeapYear(year))
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{
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return 29;
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}
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return days[month - 1];
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}
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// 计算公元1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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{
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int total = 0;
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for (int i = 1; i < year; i++)
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{
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if ((i % 4 == 0 && i % 100!= 0) || i % 400 == 0)
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{
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total += 366;
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} else {
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total += 365;
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}
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}
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for (int i = 1; i < month; i++)
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{
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if (year == 1582 && i == 10)
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{
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// 如果是1582年且计算到10月，减去10天
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if (day >= 15)
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{
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day -= 10;
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}
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}
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total += daysInMonth(year, i);
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}
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total += day;
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return total;
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}
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// 判断输入是否为合法的数字
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int isNumber(char *input)
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{
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for (int i = 0; input[i]!= '\0'; i++)
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{
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if (input[i] < '0' || input[i] > '9')
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{
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return 0;
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}
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}
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return 1;
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}
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// 判断日期是否合法
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int isValidDate(int year, int month, int day)
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{
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if (year <= 0)
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{
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return 0;
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}
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if (month < 1 || month > 12)
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{
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return 0;
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}
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if (day < 1 || day > daysInMonth(year, month))
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{
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return 0;
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}
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return 1;
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}
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//1852
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int a(int year,int month,int day)
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{
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if(year==1582)
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{
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return 0;
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}
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if(month==10)
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{
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return 0;
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}
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if(day>4&&day<15)
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{
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return 0;
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}
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return 1;
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}
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// 输出一个月的日历
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void printMonth(int year, int month)
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{
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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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int startDay = (totalDays(year, month, 1) % 7);
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for (int i = 0; i < startDay; i++)
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{
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printf(" ");
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}
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int days = daysInMonth(year, month);
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for (int i = 1; i <= days; i++)
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{
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printf("%2d ", i);
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if ((totalDays(year, month, i) % 7) == 6)
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{
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printf("\n");
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}
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}
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if ((totalDays(year, month, days) % 7)!= 6)
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{
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printf("\n");
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}
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}
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// 获取指定日期是周几
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int isWeek(int totalDay) {
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return (totalDay % 7);
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}
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// 计算某月某天的日期
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int Count_Day(int day[]) {
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return (day[0] * 1000 + day[1] * 100 + day[2] * 10 + day[3]);
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}
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// 双列输出日历的核心函数
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void printDoubleColumnCalendar(int year) {
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// 对2个月分为6个块进行打印
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for (int block = 0; block < 6; ++block) {
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// 打印表头
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printf("%2d月 %2d月 \n", block + 1, block + 7);
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printf("日 一 二 三 四 五 六 日 一 二 三 四 五 六\n");
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int lineEnd_l = 1, lineEnd_r = 1;
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int day_l[] = {year, block + 1, 1};
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int day_r[] = {year, block + 7, 1};
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int totalDay_l = Count_Day(day_l);
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int totalDay_r = Count_Day(day_r);
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// 每个月有5行需要输出
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for (int line = 0; line < 5; ++line) {
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// flag作标记位，每行有16个输出数字的位置，第9位和16位始终置0，其余位置不为0则输出数字
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int flag[16] = {0};
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// 标记第一行和其它行，用lineEnd_L和R作为整体的日期统计
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if (line == 0) {
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int monthFirstday_l = isWeek(totalDay_l) + 1;
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int monthFirstday_r = isWeek(totalDay_r) + 1;
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for (int stringStation = monthFirstday_l; stringStation < 8; ++stringStation) {
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flag[stringStation] = lineEnd_l++;
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}
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for (int stringStation = monthFirstday_l + 8; stringStation < 16; ++stringStation) {
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flag[stringStation] = lineEnd_r++;
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}
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} else {
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for (int stringStation = 1; stringStation < 8; ++stringStation) {
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flag[stringStation] = lineEnd_l++;
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if (lineEnd_l > (daysInMonth(year, block + 1))) {
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break;
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}
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}
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for (int stringStation = 9; stringStation < 16; ++stringStation) {
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flag[stringStation] = lineEnd_r++;
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if (lineEnd_r > (daysInMonth(year, block + 7) + 1)) {
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break;
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}
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}
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}
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// 输出每行的日期
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for (int i = 1; i < 16; ++i) {
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if (i == 9) {
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printf(" ");
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}
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if (flag[i] == 0) {
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printf(" ");
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} else {
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if (flag[i] < 10) {
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printf(" %d", flag[i]);
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} else {
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printf(" %d", flag[i]);
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}
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}
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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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// 菜单选项1：判断闰年和星期几
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void option1(void)
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{
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char yearStr[10], monthStr[10], dayStr[10];
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int year, month, day;
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// 输入年份并验证
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printf("请输入年份：");
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scanf("%s", yearStr);
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if (!isNumber(yearStr))
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{
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printf("输入错误，请输入数字！\n");
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return;
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}
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year = atoi(yearStr);
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// 输入月份并验证
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printf("请输入月份：");
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scanf("%s", monthStr);
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if (!isNumber(monthStr))
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{
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printf("请输入数字！\n");
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return;
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}
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month = atoi(monthStr);
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// 输入日期并验证
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printf("请输入日期：");
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scanf("%s", dayStr);
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if (!isNumber(dayStr))
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{
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printf("输入错误，请输入数字！\n");
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return;
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}
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day = atoi(dayStr);
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// 验证日期整体合法性
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if (!isValidDate(year, month, day))
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{
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printf("日期不合法！\n");
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return;
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}
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if(!a(year,month,day))
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{
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printf("不存在此日期。\n");
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return;
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}
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// 判断闰年并输出
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if (isLeapYear(year))
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{
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printf("%d年是闰年。\n", year);
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}
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else
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{
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printf("%d年不是闰年。\n", year);
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}
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// 计算并输出星期几
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int total = totalDays(year, month, day);
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char *weekdays[] = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
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printf("%d年%d月%d日是%s\n", year, month, day, weekdays[total % 7]);
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}
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// 菜单选项2：输出一年的日历（实现较好的双列输出）
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void option2(void)
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{
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char choiceStr[10];
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int choice;
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// 选择输出方式并验证
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printf("请选择输出方式(1: 单列输出，2: 双列输出): ");
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scanf("%s", choiceStr);
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if (!isNumber(choiceStr))
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{
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printf("输入错误，请输入数字！\n");
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return;
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}
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choice = atoi(choiceStr);
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if (choice!= 1 && choice!= 2)
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{
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printf("选择错误！\n");
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return;
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}
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char yearStr[10];
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int year;
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// 输入年份并验证
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printf("请输入年份：");
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scanf("%s", yearStr);
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if (!isNumber(yearStr))
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{
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printf("输入错误，请输入数字！\n");
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return;
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}
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year = atoi(yearStr);
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if (year <= 0)
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{
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printf("年份不合法！\n");
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return;
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}
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//单列输出
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if (choice == 1)
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{
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for (int month = 1; month <= 12; month++)
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{
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printMonth(year, month);
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}
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}
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else
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{
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printDoubleColumnCalendar(year);
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}
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}
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int main(void)
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{
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int choice;
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while(choice<=2)
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{
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// 显示菜单并获取用户选择
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printf("1. 判断闰年和星期几\n");
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printf("2. 输出一年的日历\n");
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printf("请选择：");
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scanf("%d", &choice);
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switch (choice)
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{
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case 1:
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option1();
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break;
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case 2:
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option2();
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break;
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default:
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printf("退出程序\n");
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break;
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}
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}
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return 0;
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} |