save project

diy2.py

+l='lby'
+b='123456'
+while True:
+    name=input("请输入用户名:")
+    password=input("请输入密码:")
+    if name ==l and password ==b:
+        print("登录成功")
+        break
+    if name != l:
+        print("用户名不存在，请重新输入！")
+        continue
+    if password != b:
+        print("密码错误，请重新输入！")    
+print("欢迎来到编程世界")
+    
\ No newline at end of file