diff --git a/01：概述/01.md b/01：概述/01.md
index 7d3f2e1..6a4ff00 100644
--- a/01：概述/01.md
+++ b/01：概述/01.md
@@ -131,7 +131,7 @@ struct Circle
     float y;    // Y坐标
     float r;    // 半径
     function void print(){
-        printf("The position x=%f, y=%f, radius=%f!\n", c->x, c->y, c->r);
+        printf("The position x=%f, y=%f, radius=%f!\n", x, y, r);
     }
 };
 struct Circle c1;