save project

diy1.py

 username="python"
 username="python"
 userpassword="123456"
 userpassword="123456"
-name=input("请输入用户名")
-password=input("请输入密码 ")
-if name == username and password == userpassword:
-    print("登入成功!")    
+while True:
+    name=input("请输入用户名")
+    password=input("请输入密码 ")
+    if name == username and password == userpassword:
+        print("登入成功!")    
+        break
+    if name != username:
+        print("用户名不正确！请重新输入!")
+    if password != userpassword:
+        print("密码不正确！请重新输入!")
+print("欢迎来到贝尔编程!")
\ No newline at end of file