init commit

archive/design pattern/factory/factory.cpp

@@ -0,0 +1,91 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+class Image
+{
+public:
+    virtual void read() = 0;
+};
+
+class ImageFactory
+{
+public:
+    virtual Image *create() = 0;
+    virtual void read() = 0;
+};
+
+class JpgImage : public Image
+{
+public:
+    string filename;
+
+public:
+    JpgImage(string filename)
+    {
+        this->filename = filename;
+    }
+
+    void read()
+    {
+        cout << "读取jpg文件:" << this->filename << endl;
+    }
+};
+
+class PngImage : public Image
+{
+public:
+    void read()
+    {
+        cout << "读取png图片" << endl;
+    }
+};
+
+class JpgImageFactory : public ImageFactory
+{
+private:
+    Image *img;
+
+public:
+    Image *create()
+    {
+        this->img = new JpgImage("file-name");
+        return this->img;
+    }
+
+    void read()
+    {
+        img->read();
+    }
+};
+
+class PngImageFactory : public ImageFactory
+{
+private:
+    Image *img;
+
+public:
+    Image *create()
+    {
+        this->img = new PngImage();
+        return this->img;
+    }
+    void read()
+    {
+        img->read();
+    }
+};
+
+int main()
+{
+    ImageFactory *factory = new JpgImageFactory();
+    Image *img = factory->create();
+    img->read();
+    factory->read();
+
+    factory = new PngImageFactory();
+    img = factory->create();
+    img->read();
+    factory->read();
+    return 0;
+}