save project

diy2.py

@@ -2,11 +2,12 @@ username = "python"
 userpassword = "123456"
 i=0
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-    print("用户名和密码错误!请重新输入")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        if name == username and password == userpassword:
+            print("登录成功!")
+        print("用户名和密码错误!请重新输入")
     i=i+1
     if i==5:
         exit()