diff --git a/common.h b/common.h
new file mode 100644
index 0000000..fc0213d
--- /dev/null
+++ b/common.h
@@ -0,0 +1,66 @@
+ #pragma once
+
+#include <string>
+#include <conio.h>
+#include <graphics.h>
+
+//蛇的节点半径
+#define SNAKE_RADIU 9
+//食物的半径
+#define FOOD_RADIU 8
+
+//蛇的节点宽度
+#define SNAKE_WIDTH 20
+
+//COLORREF BG_COLOR = RGB(0,0,0);		//背景颜色为黑色
+
+#define BG_COLOR 0
+
+
+//方向的枚举
+enum class Dir { DIR_UP = 1, DIR_RIGHT = 2, DIR_DOWN = 3, DIR_LEFT = 4 };
+
+//点的结构体
+struct Point {
+	int x;
+	int y;
+
+	Point() :x(-1), y(-1) {}
+	Point(int dx, int dy) :x(dx), y(dy) {}
+	Point(const Point& point) :x(point.x), y(point.y) {}
+
+	bool operator==(const Point& point)
+	{
+		return (this->x == point.x) && (this->y == point.y);
+	}
+
+};
+
+//记录游玩信息
+struct PlayerMsg
+{
+	int id;
+	int score;
+	int len;
+	std::string r_time;	//记录时间
+
+	PlayerMsg()
+	{
+		id = 99;
+		score = 0;
+		len = 0;
+		r_time = "";
+	}
+};
+
+struct SortPlayerMsg
+{
+	bool operator()(const PlayerMsg& msg1, const PlayerMsg& msg2)
+	{
+		if (msg1.score == msg2.score)
+		{
+			return msg1.r_time > msg2.r_time;
+		}
+		else return msg1.score > msg2.score;
+	}
+};