save project

0.py

+username="python"
+userpassword="123456"
+i=3
+while True:
+    if i>0:
+        i-=1
+        name=input("输入账号：")
+        password=input("输入密码：")
+        if name==username and userpassword==password:
+            print("登陆成功")
+            break
+        if name!=username:
+            print("name错")
+            
+        if userpassword!=password:
+            print("password错")
+    else:
+        print("账号已被封")
+        exit()        
+print("欢迎来到贝尔编程!")     
\ No newline at end of file