hard q31: define MapGrid for map

README.md

@@ -0,0 +1,3 @@
+# 26国庆招新综合考核试题实践题部分 
+## 代码思路目录
+- [q30 README](q30/README.md)

q30/README.md

@@ -0,0 +1,4 @@
+### 困难部分第 30 题
+此题考查继承与多态，我只需要按题目去定义即可。为了方便在列表中创建实例，加了`__init__`方法。Python 定义抽象类需要来自模块 abc 的装饰器 @abstractmethod，能够让 Pylance 不发出协变不兼容警告，此处为了简便没有使用
+
+[回到主项目 README](../README.md)

q30/shapes.py

@@ -3,12 +3,20 @@ class Shape:
         return 0
 
 class Circle(Shape):
+    def __init__(self, r):
+        self.r = r
+
     def area(self):
-        return 3.14 * r * r
+        return 3.14 * self.r * self.r
 
 class Square(Shape):
+    def __init__(self, side):
+        self.side = side
+
     def area(self):
-        return side * side
+        return self.side * self.side
 
 if __name__ == '__main__':
-    
+    shapes = [Circle(3), Square(5)]
+    for s in shapes:
+        print(s.area())

q31/mapGrid.h

@@ -0,0 +1,50 @@
+#include <string>
+#include <memory>
+#include <vector>
+#include <unordered_map>
+
+enum class TileType{
+    EMPTY,
+    WALL,
+    NOMAL_BEAN,
+    ENERGY_BEAN,
+    PACMAN,
+    GHOST
+};
+
+struct Tile{
+    TileType type;
+    std::unordered_map<TileType, std::string> tileTypeToPlaceholder{
+        {TileType::EMPTY, " "},
+        {TileType::WALL, "#"},
+        {TileType::NOMAL_BEAN, "."},
+        {TileType::ENERGY_BEAN, "o"},
+        {TileType::PACMAN, "P"},
+        {TileType::GHOST, "G"}
+    };
+
+    Tile() = default;
+    Tile(TileType t) : type(t) {}
+};
+
+class MapGrid{
+public:
+    MapGrid() = default;
+
+    MapGrid(const std::string& mapFilePath);
+    
+    void loadMap(const std::string& mapFilePath);;
+
+    std::unique_ptr<std::pair<int, int>> getSize() const;
+
+    bool isValidPosition(int x, int y) const;
+
+    void setTile(int x, int y, TileType type, const std::string& placeholder);
+
+    void renderMap() const;
+
+    void move();    // 应该是 W A S D 移动
+private:
+    std::vector<std::vector<Tile>> grid;
+    std::unique_ptr<std::pair<int, int>> size;
+};