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:")
-    if name == username and password == userpassword:
-        print("登录成功")   
-        print("欢迎来到贝尔编程!")     
-    elif  username!=name  :         
-        print("用户名错误")
-    else:
-        password=input("请输入密码:")
-        print("密码错误")         
+    if  i>0:
+        if  i==3 and i>3:
+                print("您的次数已用尽")
+                break    
+        name = input("请输入用户名:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功")   
+            print("欢迎来到贝尔编程!")     
\ No newline at end of file
+        elif  username!=name  :         
+            print("用户名错误")
+        else:
+            password=input("请输入密码:")
+            print("密码错误")
+exit()          
\ No newline at end of file