ADD file via upload

mydate.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include "mydate.h"
+
+mydate::mydate(int _year, int _month, int _day)
+    : year{_year}, month{_month}, day{_day}
+{
+    std::cout << "创建了日期对象 ";
+    print();
+}
+
+mydate::~mydate()
+{
+    std::cout << "撤销了日期对象 ";
+    print();
+}
+
+void mydate::print()
+{
+    std::cout << year << '-' << month << '-' << day << '\n';
+}