save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
+    i=0
     name = input("请输入用户名:")
     name = input("请输入用户名:")
     password = input("请输入密码:")
     password = input("请输入密码:")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
@@ -11,4 +12,7 @@ while True:
         continue
         continue
     if password != userpassword:
     if password != userpassword:
         print("密码错误")
         print("密码错误")
+        i+=1
+    if i==3:
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file