1 #include "stdafx.h"
2 #include <stdlib.h>
3 #include <string.h>
4 #include <time.h>
5
6 #define IS_LEAP_YEAR(y) (((y) % 4 == 0 && (y) % 100 != 0) || (y) % 400 == 0)
7
8 #define if_not_eual_ret(left, right) do { 9 if (left < right) {return true;} else if(left > right) {return false;} 10 } while(0)
11
12 //从网上抄的 计算日期相差天数的函数
13 int day_diff(int year_start, int month_start, int day_start,
14 int year_end, int month_end, int day_end)
15 {
16 int y2, m2, d2;
17 int y1, m1, d1;
18
19 m1 = (month_start + 9) % 12;
20 y1 = year_start - m1/10;
21 d1 = 365*y1 + y1/4 - y1/100 + y1/400 + (m1*306 + 5)/10 + (day_start - 1);
22
23 m2 = (month_end + 9) % 12;
24 y2 = year_end - m2/10;
25 d2 = 365*y2 + y2/4 - y2/100 + y2/400 + (m2*306 + 5)/10 + (day_end - 1);
26
27 return (d2 - d1);
28 }
29
30
31 class CMyDateTime
32 {
33 public:
34 CMyDateTime(int sec_from_beg = 0)
35 {
36 m_sec_from_beg = sec_from_beg;
37 }
38
39 CMyDateTime(int year, int month, int day, int hour, int minute, int second)
40 {
41 m_sec_from_beg = to_second(year, month, day, hour, minute, second);
42 }
43
44 bool operator < (const CMyDateTime& theDate)
45 {
46 return m_sec_from_beg < theDate.m_sec_from_beg;
47 }
48
49 //获得0001 01:01:00至当前时间秒数
50 long long to_second()
51 {
52 return m_sec_from_beg;
53 }
54
55
56 //年 取1900-3000 月 取0-11 日 取1-31 时分秒 取0-59
57 static long long to_second(int year, int month, int day, int hour, int minute, int second)
58 {
59 //获取当前日期至纪元1年的天数
60 int y1 = year, m1 = 0, d1 = day - 1;
61 long long sec;
62
63 //每月天数
64 int month_day[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
65
66 if (IS_LEAP_YEAR(year))
67 {
68 month_day[1]++;
69 }
70 for (int i = 0; i < month; i++)
71 {
72 m1 += month_day[i];
73 }
74
75 y1 -= 1;
76 d1 = 365*y1 + y1/4 - y1/100 + y1/400 + m1 + d1;
77
78 //24小时 60分 60秒
79 sec = (long long)d1 * (24 * 60 * 60);
80 sec += hour * 3600 + minute * 60 + second;
81 return sec;
82 }
83
84 //把秒数转换成标准日期
85 bool to_date(int& year, int& month, int& day, int& hour, int& minute, int& second)
86 {
87 // 先计算大概年份，用秒数除以366天秒数
88 int day_from_beg = (int)(m_sec_from_beg / (24 * 60 * 60));
89
90 int second_left = int(m_sec_from_beg - day_from_beg * (long long) (24 * 60 * 60));
91 hour = second_left / (60 * 60);
92
93 second_left = int (second_left - hour * (60 * 60));
94 minute = second_left / 60;
95 second = second_left % 60;
96
97 int year_cnt = day_from_beg / 366;
98 //每年365天 闰年多一天
99 int day_from_beg_to_year = (year_cnt * 365 + year_cnt / 4 - year_cnt / 100 + year_cnt / 400);
100
101 //然后逐年累加天数，直到天数大于day_from_beg
102 while (day_from_beg_to_year <= day_from_beg)
103 {
104 if (IS_LEAP_YEAR(year_cnt + 1))
105 {
106 day_from_beg_to_year += 366;
107 }
108 else
109 {
110 day_from_beg_to_year += 365;
111 }
112 year_cnt++;
113 }
114 //因为是要取最后一个小于等于在数 所以在这里要减一
115 year_cnt--;
116
117 //知道年份后，再计算月份 先计算出当前日期距离今年开始相差多少天
118 int day_from_year = day_from_beg - (year_cnt * 365 + year_cnt / 4 - year_cnt / 100 + year_cnt / 400);
119 //今年的年数 = 经过的年数 + 1
120 year = year_cnt + 1;
121
122 //每月天数
123 int month_day[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
124
125 if (IS_LEAP_YEAR(year))
126 {
127 month_day[1]++;
128 }
129
130 for (month = 0; month < 12; month++)
131 {
132 if ((day_from_year - month_day[month]) < 0)
133 {
134 break;
135 }
136
137 day_from_year -= month_day[month];
138 }
139 day = day_from_year + 1;
140 return true;
141 }
142 private:
143 //当前日期至纪元1年的秒数
144 long long m_sec_from_beg;
145 };
146
147 //测试函数，测试每一秒钟从人类日期格式转换成CMyDateTime 再转换回来是否正确
148 void test_time()
149 {
150 int month_day[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
151
152 for (int year = 1; year < 2100; year++)
153 {
154 double start = GetTickCount();
155 bool is_leap = IS_LEAP_YEAR(year);
156 if (is_leap)
157 {
158 month_day[1] = 29;
159 }
160
161 for (int month = 0; month < 12; month++)
162 {
163 for (int day = 1; day <= month_day[month]; day++)
164 {
165 for (int hour = 0; hour < 24; hour++)
166 {
167 for (int minute = 0; minute < 60; minute++)
168 {
169 for (int second = 0; second < 60; second++)
170 {
171 CMyDateTime t(year, month, day, hour, minute, second);
172 int year_new, month_new, day_new, hour_new, minute_new, second_new;
173 if (t.to_date(year_new, month_new, day_new, hour_new, minute_new, second_new))
174 {
175 if (year != year_new || month != month_new || day_new != day ||
176 hour != hour_new || minute != minute_new || second != second_new)
177 {
178 printf("day = %d day_new = %d\n", day, day_new);
179 printf("month = %d month_new = %d\n", month, month_new);
180 printf("year = %d year_new = %d\n", year, year_new);
181
182
183 printf("hour = %d hour_new = %d\n", hour, hour_new);
184 printf("minute = %d minute_new = %d\n", minute, minute_new);
185 printf("second = %d second_new = %d\n", second, second_new);
186 printf("------------------------\n");
187 }
188 }
189 }
190 }
191 }
192 }
193 }
194
195 if (is_leap)
196 {
197 month_day[1] = 28;
198 }
199
200 //我的机器一年花5秒左右 效率不是特别高 但目前没有优化头绪
201 printf("总共耗时 %f 毫秒\n", GetTickCount() - start);
202 printf("------------[%04d]------------\n", year);
203 }
204 }
时间： 2024-11-10 00:14:15