save project

diy2.py

+username = "1"
+userpassword = "2"
+while True:
+    c= input("请输入用户名:")
+    d = input("请输入密码:")
+    if c == username and d == userpassword:
+        print("登录成功!")
+        break
+    if username==c:
+        print("账号正确")
+        continun
+    else:
+          print("账号错误")   
+    if userpassword==d:
+        print("密码正确")
+        continun   
+    else:
+             print("密码错误")
+print("欢迎来到贝尔编程!")
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