update dir

const/class_const/static_example/apple.cpp

@@ -0,0 +1,14 @@
+class Apple
+{
+private:
+    int people[100];
+public:
+    Apple(int i);
+    static int ap; //在类实现文件中定义并初始化
+    static const int apple_number;
+    void take(int num) const;
+    int add(int num);
+    int add(int num) const;
+    int getCount() const;
+};
+

const/class_const/static_example/main.cpp

@@ -0,0 +1,34 @@
+#include<iostream>
+#include"apple.cpp"
+using namespace std;
+const int Apple::apple_number=10;
+int Apple::ap=666;
+Apple::Apple(int i)
+{
+
+}
+int Apple::add(int num){
+    take(num);
+}
+int Apple::add(int num) const{
+    take(num);
+}
+void Apple::take(int num) const
+{
+    cout<<"take func "<<num<<endl;
+}
+int Apple::getCount() const
+{
+    take(1);
+//    add(); //error
+    return apple_number;
+}
+int main(){
+    Apple a(2);
+    cout<<a.getCount()<<endl;
+    cout<<a.ap<<endl;
+    a.add(10);
+    const Apple b(3);
+    b.add(100);
+    return 0;
+}