save project

diy2.py

 username = "python"
 userpassword = "123456"
+i=3
 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!")
-        break
-    if name != username:
-        print("用户名错误!")
-        continue
-    if password != userpassword:
-        print("密码错误!") 
-    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:")
+        i=i-1
+        if name == username:
+            password = input("请输入密码:")
+            if password==userpassword:
+                print("登录成功!")
+                break 
+            else:
+                print("密码错误!")
+        else:
+            print("用户名错误!")
+    else:
+        print("你的次数用完了。")
+        exit()
+print("欢迎来到贝尔编程!")
+
+     
+