save project

diy2.py

+b=6
 username = "20170904"
 username = "20170904"
 userpassword = "19481201"
 userpassword = "19481201"
 while True:
 while True:
-    name = input("给我输入用户名:")
-    password = input("给我输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
+    if  b>0:
+        name = input("给我输入用户名:")
+        password = input("给我输入密码:")
+        b=b-1
+        if name == username and password == userpassword:
+            print("登录成功!")
 
 
-        break   
-    if name!=username:
-        print("用户名错误!给我重新输入")
-        
+            break   
+        if name!=username:
+            print("用户名错误!给我重新输入")
+            
+        else:
+            if password != userpassword:
+                print("密码错误!给我重新输入")
     else:
     else:
-        if password != userpassword:
-            print("密码错误!给我重新输入")
-   
+        print("**账号去世，请换一个")
+        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