save project

diy2.py

+username="phthon"
+userpassword="123456"
+name=input("你的用户名")
+password=input("你的密码")
+a=3
+while True:
+    a=a-1
+    if name!=username:
+        print("名字错误")
+        name=input("你的用户名")
+    if password!=userpassword:
+        print("密码错误")
+        password=input("你的密码")
+    if name==username and password==userpassword:
+        print("登入成功")
+        break
+    if a<0:
+        print("n")
+        exit()
+print("欢迎来到贝尔编程")
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