auto save

sb.py

+r=float(input("请输入半径: "))
+pi=3.1415
+print("周长是:",round(pi*2*r,2),"面积是:",round(pi*r*r,2),"直径是:",round(2*r,2))
\ No newline at end of file

sth.py

+r=float(input("输入半径:"))
+pi=3.1415
+print("圆的周长：%.2f"%(2*pi*r),"圆的面积：%.2f"%(r*r*pi),"圆的直径：%.2f"%(2*r))
\ No newline at end of file

tt.py

-with open(r'C:\Users\Administrator\Desktop\tt.txt','r',encoding='utf-8')as a:
-    for i in a:
-        print(i)
\ No newline at end of file