save project

diy2.py

+i=3
 username = "python"
 userpassword = "123456"
 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!")
-        break
-    if name != username:
-        print("用户名不存在，请重新输入！！！")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username:
+            print("用户名不存在，请重新输入！！！")
+        else:
+            print("密码输入有误，请重新输入！！！")
     else:
-        print("密码输入有误，请重新输入！！！")
+        print("你个憨憨，你也不行啊！")
+        exit()    
 print("欢迎来到贝尔编程///")
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