save project

dd.py

+a="python"
+b="123456"
+while True:
+    c=input("请输入用户名：")
+    d=input("请输入密码：")
+    if c==a and d==b:
+        print("登陆成功！")
+        break
+    if c!=a:
+        print("用户名输入错误")
+        continue
+    if d!=b:
+        print("密码输入错误")
+        continue
\ No newline at end of file