save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=0
+while True:
+    if i<2:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        if name == username and password == userpassword:
+            print("登陆成功")
+            break
+        if name != username:
+            print("用户名错误!请重新输入")
+            i+=1
+            print("剩下"+str(i)+"次")
+            continue
+            
+        if password != userpassword:
+            print("密码错误!请重新输入")
+            print("剩下"+str(i)+"次")
+            i+=1
+            continue
+    else:
+        print("以禁用")
+        exit()        
+
+print("欢迎来到贝尔编程!")