save project

diy2.py

+a=5
+username = "python"
+userpassword = "123456"
+while True:
+    if a>0:
+        a=a-1
+        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!")
+            break
+        if name!=username:
+            print("用户名错误,请重新输入")
+            print('你还有'+str(a)+'机会')
+            continue
+        if password!=userpassword:
+            print("密码错误,请重新输入")
+            print('你还有'+str(a)+'机会')
+            
+    else:
+        print('锁定账号')
+        exit()
+print("欢迎来到贝尔编程!")
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