save project

diy2.py

 username = "q"
 username = "q"
 userpassword = "1"
 userpassword = "1"
+i=3
 while True:
 while True:
+    if i > 0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i-=1
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
         elif  name !=username:
         elif  name !=username:
             print("账号错误")       
             print("账号错误")       
-        
         elif  password!=userpassword:
         elif  password!=userpassword:
             print("密码错误")
             print("密码错误")
-    
+    else:
+        print("三次机会已用完")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file