save project

diy2.py

-i=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    if i>3:
-        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("用户名不存在，请重新输入")
-        continue
-        if password!=userpassword:
-        print("密码错误，请重新输入")
-    else:
-        print("登入次数已用完")
+    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("用户名不存在，请重新输入")
+       continue
+    if password!=userpassword:
+       print("密码错误，请重新输入")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file

diy3.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!")
+            break
+        if name!=username:
+            print("用户名不存在，请重新输入")
+            continue
+        if password!=userpassword:
+            print("密码错误，请重新输入")
+    else:
+        print("登入次数已用完")
+        break
+print("欢迎来到贝尔编程!")
\ No newline at end of file