save project

diy2.py

+i=3
 username = "python"
 userpassword = "123456"
 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('账号输入错误')
-        continue
+    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!")
+            break
+        if name != username:
+            print('账号输入错误')
+            continue
+        else:
+            print('密码输入错误')
     else:
-        print('密码输入错误')
+        print('登录次数用完啦')
+        exit()
 print('欢迎来到编程世界')
\ No newline at end of file