第四周。

OOP/04/Exercise01.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+
+class Date {
+private:
+    int d, m, y;
+
+public:
+    Date(int dd = 0, int mm = 0, int yy = 0);
+    void addDay();
+    friend Date operator ++(Date& D);
+    friend Date operator ++(Date& D, int);
+    void Print();
+};
+
+Date::Date(int dd, int mm, int yy): d(dd), m(mm), y(yy){};
+
+Date operator ++(Date& D) {
+    D.addDay();
+    return D;
+}
+Date operator ++(Date& D, int) {
+    Date tmp = Date(D);
+    D.addDay();
+    return tmp;
+}
+
+void Date::addDay() {
+    this->d++;
+}
+
+void Date::Print() {
+    std::cout << this->d << "," << this->m << "," << this->y << std::endl;
+}
+
+int main() {
+    Date aDay = Date(12,3,2023);
+    aDay++.Print();
+    aDay.Print();
+    (++aDay).Print();
+    aDay.Print();
+    return 0;
+}