save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+     
+    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("账号不正确，请重新输入：")
+            print("温馨提示：您还有"+str(i)+"次机会")
+            continue
+        if password!=userpassword:
+            print("密码不正确，请重新输入：")
+           
+    else:
+        print("机会用尽")
+        exit()
+        
+print("欢迎来到贝尔编程!")
\ No newline at end of file