auto save

diy2.py

-i=3
 username = "tyyuiu"
 username = "tyyuiu"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    if i>0:
-        name = input("请输入用户名:")
-        if  name!=username:
-            print("用户名错误!请重新输入")
-            i-=1
-            print(i)
-            continue
-        password = input("请输入密码:")
-        if  password != userpassword:
-            print("密码错误!请重新输入")
-            i-=1
-            print(i)
-            continue
-        if name == username and password == userpassword:
-            print("登录成功!")
-    else:
-        break        
+    name = input("请输入用户名:")
+    if  name!=username:
+         print("用户名错误!请重新输入")
+         continue
+    password = input("请输入密码:")
+    if  password != userpassword:
+        print("密码错误!请重新输入")
+        continue
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
     print("用户名和密码错误!请重新输入")
     print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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