save project

diy2.py

+i=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
+        if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i=i-
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
         if username!=name:
         if username!=name:
             print("用户名错误")
             print("用户名错误")
+            continue
         if userpassword!=password:
         if userpassword!=password:
+            exit()
             print("密码错误")
             print("密码错误")
-        continue
+