update

2020-04-06 00:57:02 +08:00
parent f97c156cc4
commit a4d828bb4c
120 changed files with 4413 additions and 0 deletions
--- a/practical_exercises/10_day_practice/day6/纯虚函数和抽象类/抽象类.cpp
+++ b/practical_exercises/10_day_practice/day6/纯虚函数和抽象类/抽象类.cpp
@@ -0,0 +1,46 @@
+#include<iostream>
+using namespace std;
+class Figure{
+    protected:
+        double x,y;
+    public:
+        void set(double i, double j){
+            x=i;y=j;
+        }
+        virtual void area()=0;
+};
+
+class Trianle:public Figure{
+    public:
+        void area(){
+            cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<x*y*0.5<<endl;
+        }
+};
+class Rectangle:public Figure{
+    public:
+        void area(){
+            cout<<"<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD>Σ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD>"<<x*y<<endl;
+        }
+};
+
+int main(int argc, char const *argv[])
+{
+    //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>
+    Figure *pF=NULL;
+    // Figure f1; <20><><EFBFBD><EFBFBD><EFBFBD>಻<EFBFBD>ܱ<EFBFBD>ʵ<EFBFBD><CAB5><EFBFBD><EFBFBD>
+    Rectangle r;
+    Trianle t;
+    t.set(10,20);
+    pF=&t;
+    pF->area();
+    r.set(10,20);
+    pF=&r;
+    pF->area();
+    //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    Figure &rF=t;
+    rF.set(20,20);
+    rF.area();
+    system("pause");
+    return 0;
+}
+