auto save

Untitled-1.py.py

+# import turtle
+# pen=turtle.Pen()
+# pen.pensize(2)
+# pen.pencolor('red')
+# for i in range(4):
+#     pen.goto(0,0)
+#     pen.forward(100)
+#     pen.left(90)
+# pen.circle(100)
+# pen.hideturtle()
+# turtle.done()
+# N=int(input("请输入奶牛的头数"))
+# print(N,"头奶牛7天可以产",N*20*7,"千克的牛奶")