save project

diy2.py

+username = "1"
+userpassword = "12345"
+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("用户名错了")
+            continue
+        if password != userpassword:
+            print("密码错了")
+            print("提示：还有"+str(i)+"次机会")
+        if name == username and password == userpassword:
+            print("登录成功!")
+            print("提示：还有"+str(i)+"次机会")
+            break 
+        print("用户名和密码错误!请重新输入")
+    else:
+        print("账号错误，没机会了")
+        exit()
+   
+print("欢迎来到贝尔编程!")
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