save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+E=3
 while True:
 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!")
+    if E > 0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        E-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
\ No newline at end of file
+            break
+        else:
+            if name != username :
+                print("用户名错误")
+            elif  password !=  userpassword:
+                print("密码错误")
+
+    else:
+        print("次数已经用完,请联系好叼小朋友")
+        exit(-1)                
+
+    
\ No newline at end of file