save project

diy2.py

+i=3
 username = "dwn"
 username = "dwn"
 userpassword = "dwnNB"
 userpassword = "dwnNB"
 while True:
 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("此用户不存在，请重新输入用户名")
-        continue
-    if password != userpassword:
-        print("密码错误！请重新输入密码")
+    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("此用户不存在，请重新输入用户名")           
+            continue           
+        if password != userpassword:
+            print("密码错误！请重新输入密码")            
+    else:
+        print("账户锁定，系统自爆")    
+        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