save project

diy2.py

-username = "python"
-userpassword = "123456"
+username = "lyh"
+userpassword = "lyh110704"
+cout=0
+while True:
+    username1=input("输入账号")
+    password1=input("输入密码")
+    cout=cout+1
+    print("输入次数：",cout)
+    if cout<3:
+        if username==username1:
+            if userpassword==password1:
+                print("欢迎登录")
+                break
+            else:
+                print("密码错误，请重新输入")
+        else:
+            print("用户名不存在，请重新输入")
+    else:
+        print("请等待3秒后再尝试")
+        break
+print("欢迎"+username1+"来到腾讯QQ")