auto save

diy2.py

+i=3
 username = "11"
 username = "11"
 userpassword = "22"
 userpassword = "22"
 while True:
 while True:
-    name = input("请输入用户名:")
-    if name!=username:
-        print("账号输入错误")
-        continue
-    password = input("请输入密码:")
-    if password!=userpassword:
-        print("密码输入错误")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
+    if i>0:
+        name = input("请输入用户名:")
+        i=i-1
+        if name!=username:
+            print("账号输入错误")
+            continue
+        password = input("请输入密码:")
+        if password!=userpassword:
+            print("密码输入错误")
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+    else:
+        print("你没机会了")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file