init commit

archive/design pattern/proxy_2.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+using namespace std;
+
+class Pic
+{
+public:
+    string download(string url)
+    {
+        cout << "图片下载中...";
+        return url;
+    }
+};
+
+class PicProxy
+{
+protected:
+    Pic *pic;
+
+public:
+    PicProxy()
+    {
+        pic = new Pic();
+    }
+    void download(string url)
+    {
+        cout<<"显示默认图片到列表\n";
+        cout<<"开启线程下载图片\n";
+        cout<<this->pic->download(url);
+    }
+};
+
+
+int main()
+{
+    PicProxy* p=new PicProxy();
+    p->download("img1");
+    return 0;
+}