save project

diy2.py

+i=3
+username = "python"
+userpassword = "123456"
+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 and password == userpassword:
+            print("登录成功!")
+        elif name!=username:
+            print("用户名错误!请重新输入")
+            print('你还剩下'+str(i))
+        elif password != userpassword:
+            print("密码错误!请重新输入")
+        else:
+            print("密码和用户名错误!请重新输入")
+    else:
+        print("登录失败")
+        exit()
+print("欢迎来到贝尔编程!")
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