save project

diy2.py

+i=3
+username = "python"
+userpassword = "123456"
+while True:
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i=i-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            print("欢迎来到贝尔编程！")
+            break
+        if name != username:
+            print("用户名错误！请重新输入！"+"还剩"+str(i)+"次机会可输入！")
+            continue
+        if password != userpassword:    
+            print("密码错误!请重新输入"+"还剩"+str(i)+"次机会可输入！")
+    else:   
+        print("三次输入机会已用完！请再单击一次屏幕上方的“运行”按钮！")
+        exit()
\ No newline at end of file