save project

diy2.py

+username = "python"
+userpassword = "123456"
+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!")
+    print("用户名和密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
+username = "python"
+i=0
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if i>=3:
+        print("界面锁定")
+        exit()    
+    i+=1
+    
+
+    print("error:",i)
+    if name == username and password == userpassword:
+        print("登录成功!")
+        print("欢迎来到贝尔编程!")
+        break
+    elif name!=username:
+        print("账号错误")
+        continue    
+    elif password!=userpassword:
+        print("密码错误")
+    
+        
+
+