save project

diy2.py

@@ -3,13 +3,17 @@ userpassword = "123456"
 while True:
 while True:
     n = input("请输入用户名:")
     n = input("请输入用户名:")
     p = input("请输入密码:")
     p = input("请输入密码:")
-   if n == username and p == userpassword:
-        print("登录成功!")
-        break
-    elif n!=username:
-        print("用户名错误！")       
-    else p!=userpassword:
-        print("密码错误!")
-print("欢迎来到贝尔编程!")
+    if n == username and p == userpassword:
+        i<0:    
+            print("登录成功!")
+            break
+        if n!=username:
+            print("用户名错误！")       
+            continue
+        if p!=userpassword:
+            print("密码错误!")
+        print("欢迎来到贝尔编程!")
+        else:
+            exit()
 
 
-    
+        
\ No newline at end of file