save project

diy2.py

 un = "python"
 un = "python"
 up = "123456"
 up = "123456"
+i = 3
 while True:
 while True:
+    if i == 0:
+        print("尝试次数超限")
+        exit()
     nm = input("请输入用户名:")
     nm = input("请输入用户名:")
     pw = input("请输入密码:")
     pw = input("请输入密码:")
     if nm == un and pw == up:
     if nm == un and pw == up:
         print("登录成功!")
         print("登录成功!")
         break
         break
-    if nm != un:
-        print("用户名错误")
-        continue
-    if pw != up:
-        print("密码错误")
+    else:
+        print("用户名或密码错误")
+        i = i-1
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")