save project

diy2.py

 username = "python"
 userpassword = "123456"
+i = 3
 while True:
-    if i > 0
+    if i > 0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
         if name == username and password == userpassword:
@@ -9,9 +10,12 @@ while True:
             break
         if name!=username:
             print("用户名错误")
+            print("你还有"+str(i)+"次机会")
             continue
         if password!=userpassword:
             print("密码错误")
+            print("你还有"str+(i)+"次机会")
     else:
-        print("输入次数已用完")        
+        print("输入次数已用完") 
+        exit()       
 print("欢迎来到贝尔编程!")
\ No newline at end of file