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("账号错误，请重输!")
-        continue
-    if password == userpassword:
-       print("密码错误，请重输!") 
+    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("账号错误，请重输!")
+            continue
+        if password == userpassword:
+            print("密码错误，请重输!")
+    else:
+        exit()      
 print("欢迎来到贝尔编程!")
\ No newline at end of file