save project

diy2.py

@@ -4,12 +4,16 @@ 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:
     if n == username and p == userpassword:
+        i<0:    
             print("登录成功!")
             print("登录成功!")
             break
             break
-    elif n!=username:
+        if n!=username:
             print("用户名错误！")       
             print("用户名错误！")       
-    else p!=userpassword:
+            continue
+        if p!=userpassword:
             print("密码错误!")
             print("密码错误!")
-print("欢迎来到贝尔编程!")
+        print("欢迎来到贝尔编程!")
+        else:
+            exit()
 
 
         
         
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