save project

456.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name!=username:
+            print("用户名错误!请重新输入")
+            
+        elif password!=userpassword:
+            print("密码错误!请重新输入")
+            
+        else: 
+            print("登录成功!")
+    else:
+        print("已锁定，请来联系我公司")
+        exit()
+print("欢迎来到贝尔编程!")
\ No newline at end of file