什麼使這個程序循環？

Question

:prompt 
    set /p "asm_file_path=Enter full path name of asm file:" 
pause 

rem Validate the file path 
:validate 
    if not exist %asm_file_path% (
     echo Error! %asm_file_path% does not exist. Please enter valid file 
     echo. 
     goto prompt 
    ) else (
     echo File found. Continuing... 
     echo. 
    ) 

我只是試圖獲取用戶輸入並將其存儲到var asm_file_path中。但由於某種原因程序進入了無限循環的錯誤！因爲var等於「」。我試過How to get two or more commands together into a batch file和How to read input from console in a batch file?甚至是dos指南，但我只是看不到這裏有什麼問題。

編輯 該程序不讓我輸入任何內容。我正在使用Windows 98.

Answer 1

確定您正在使用Windows ？我覺得the /P and /A switches have been added to the SET command since Windows NT/2000。