save project

diy2.py

+ybc=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 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")
-        break
-    if name != username:
-        print("用户账号错误")
-        continue
-    if password != userpassword:
-        print("用户密码错误")
-        continue
-print("欢迎来到贝尔编程!")
+    if ybc>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        ybc-=1
+        if name == username and password == userpassword:
+            print("登录成功")
+            break
+        if name != username:
+            print("用户账号错误")
+            continue
+        if password != userpassword:
+            print("用户密码错误")
\ No newline at end of file
+            continue
+    else:
+            print("次数已用完")
+            exit()
+    print("欢迎来到贝尔编程!")
\ No newline at end of file