save project

diy1.py

 username = "cxk"    
 username = "cxk"    
 userpassword = "123456" 
 userpassword = "123456" 
 while True:
 while True:
+    if i>0:   
         name=input("请输入账号：")
         name=input("请输入账号：")
         password=input("请输入密码:")
         password=input("请输入密码:")
+        i-=1
         if name==username and password==userpassword:
         if name==username and password==userpassword:
             print("登录成功！") 
             print("登录成功！") 
             break
             break
-    elif name !=username:
+        if  password==userpassword
             print("用户名不存在，重新输！！！！！！！！")
             print("用户名不存在，重新输！！！！！！！！")
-    else :
+            continue
+        if password==userpassword:
             print("密码错了，滚回去重新输")
             print("密码错了，滚回去重新输")
+    else:
+        print("再见")
+         exit() 
+         print("欢迎")  
\ No newline at end of file