save project

diy2.py

-username = "python"
-userpassword = "123456"
+i=3
+username = "SB"
+userpassword = "     5     "
 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")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+    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("用户名错误!请重新输入")
+            continue
+        if password !=userpassword:
+            print("密码错误!请重新输入")
+    else:
+        print('滚')
+        exit()        
+print("欢迎来到贝尔编程!")
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