save project

diy1.py

@@ -5,15 +5,11 @@ while True:
     password=input("请输入用户密码")
     if name==username and password==userpassword:
         print("登陆成功")
-        break
     if name !=username:
         print("用户名错误,请重新输入")
+        continue
     if password != userpassword:
         print("密码错误,请重新输入")
+        break
     print("抱歉,用户名和密码错误请重新输入")
-print("欢迎来到贝尔编程")
-# 请用input()实现用户输入账号、密码的功能
-
-
-
-# 如果用户输入的账号、密码正确，提示登陆成功
\ No newline at end of file
+print("欢迎来到贝尔编程")
\ No newline at end of file

dshg.py

+'''word = 'China'
+num=3
+string='python'
+total=string*(len(word)-num)
+print(total)'''
+'''t1=(1,2,3,4,5,6,7)
+t2=("a","b","c","d","e","f")
+a1=t1[2:]
+a2=t2[2:5]
+s=a1+a2
+print(s)'''
+'''numbers=[1,3,2,8,9]
+print(numbers[1]+numbers[3])'''
+#courses=["语文","数学","编程","英语"]
+#courses.pop()
+'''import turtle
+turtle.pencolor("red")
+turtle.pensize(2)
+turtle.circle(100)
+turtle.left(90)
+turtle.forward(200)
+turtle.forward(-100)
+turtle.left(90)
+turtle.forward(100)
+turtle.forward(-200)
+turtle.done()'''
+n=int(input("请输入奶牛的头数"))
+a=n*20*7
+print(n,"头奶牛7天可以产",a,"千克的牛奶")
+