save project

diy2.py

+i=3
+while True:    
+    username = "python"
+    userpassword = "123456"
+    name = input('请输入用户账号：')
+    password = input('请输入用户密码：')
+    if i>0:    
+        if name == username and password == userpassword:
+            print('        登陆成功！      ')
+            print('欢迎来到贝尔编程！')
+            break
+        elif name == username:
+            print('         用户密码输入错误\n        请重新输入')
+            i-=1
+            print(f'您还有{i}次机会')
+        elif password == userpassword:
+            print('         用户账号输入错误\n        请重新输入')
+            i-=1
+            print(f'您还有{i}次机会')
+        else:
+            print('         用户账号和用户密码都输入错误\n        请重新输入')
+            i-=1
+            print(f'您还有{i}次机会')
+    if i==0:
+        exit()
\ No newline at end of file