auto save

diy2.py

-message = "诺依，周末一起去看动漫展吧！"
-for i in message:
-    print(i)
-
+p=3.14
+r=float(input("请输入一个大于0的半径："))
+a=2*r
+c=a*p
+s=p*r*r
+print("圆的直径是:%.2f"%a)
+print("圆的周长是:%.2f"%c)
+print("圆的面积是:%.2f"%s)
\ No newline at end of file