auto save

demo.py

+r=float(input('圆的半径：'))
+e=3.1456
+print("圆的直径是：%.2f" % (2*r))
+print("圆的周长是：%.2f" % (2*e*r))
+print('圆的面积是：',round(r*r*e,2))    
\ No newline at end of file

diy.py

 #创建一个英雄类
 class Hero:
-    def __init__(self):
+    def __init__(self,name,hp,attack):
         self.level=1  #等级
-        self.hp=300 #血量
-        self.attack=25 #攻击力
+        self.name=name  #名字
+        self.hp=hp #血量
+        self.attack=attack #攻击力
+    def upgrade(self):
+        self.level+=1
+        self.hp+=50
+        self.attack+=5
 
 #实例化对象
-yase=Hero()
-houyi=Hero()
-
+yase=Hero('亚瑟',300,25)
+houyi=Hero('后羿',240,40)
+yase.upgrade()
+houyi.upgrade()
+houyi.upgrade()
 print('亚瑟的血量是',yase.hp)
+print('后羿的血量是',houyi.hp)
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