save project

diy2.py

+i=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("用户名输入错误")
-    if  password!=userpassword
-        print("密码输入错误")
-    print("用户名和密码错误!请重新输入")
+    if i<=3:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name!=username
+            print("用户名输入错误")
+            continue
+        if  password!=userpassword
+            print("密码输入错误")
+        print("用户名和密码错误!请重新输入")
+    else:
+         
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file