save project

diy2.py

@@ -2,16 +2,19 @@ username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
     name = input("请输入用户名:")
     name = input("请输入用户名:")
-    password = input("请输入密码:")
     if name==username:
     if name==username:
+        password=input("请输入密码:")
         if password!=userpassword:
         if password!=userpassword:
             print("密码错误！")
             print("密码错误！")
         else:
         else:
             print("登陆成功！")
             print("登陆成功！")
             break
             break
+    else:
+        print("用户名错误!")
+        continue
     if name != username:
     if name != username:
         if password==userpassword:
         if password==userpassword:
-            print("用户名错误!")
+            print("用户名错误！")     
         else:
         else:
             print("用户名和密码错误！")
             print("用户名和密码错误！")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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