'commit'

TangDou/LanQiaoBei/LanQiaoBeiWhitePaper/8_DiffDate.cpp

@@ -0,0 +1,41 @@
+#include<iostream>
+
+using namespace std;
+
+struct Date {
+    int year;
+    int month;
+    int day;
+};
+int months_1[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+int months_2[13] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+bool LeapYear(int year) {
+    return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
+}
+
+//计算到元年元月元日的差
+int getAbsDay(Date x) {
+    int n = 0;
+    //以往年有多少天
+    for (int i = 1900; i < x.year; i++)
+        n += (LeapYear(i)) ? 366 : 365;
+    //月-->天数+
+    for (int i = 1; i < x.month; i++)
+        n += LeapYear(x.year) ? months_2[i] : months_1[i];
+    //天数
+    n += x.day;
+    return n;
+}
+
+int main() {
+    //计算两个日期对象的差
+    Date a = {2021, 8, 26}; //周四
+    Date b = {2021, 10, 11}; //?
+
+    //计算到元年元月元日的差
+    int n = getAbsDay(b) - getAbsDay(a);
+    //输出
+    printf("%d *%d", n, (n + 4) % 7);
+    return 0;
+}