save project

diy2.py

+username = "123456789987654321741852963369258147789456123321654987"
+userpassword = "123456789987654321741852963369258147789456123321654987"
+while True:
+    a = input("请输入用户名:")
+    b = input("请输入密码:")
+    if a == username and b == userpassword:
+        break
+        print("登录成功!")
+    else:
+        if a != username:
+            print("用户名不存在！请重新输入")
+        if b != userpassword:
+            print("密码错误！请重新输入")
+
+print("欢迎来到贝尔编程!")
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