批處理如何將從cmd窗口手動輸入的字符串統(tǒng)一轉(zhuǎn)換為大寫或小寫最后由 pcl_test 于 -11-19 22:49例如代碼如下：

ECHO 請輸入計算機名或直接回車使用預設(shè)計算機名：
set /p id=
reg add HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlComputerNameComputerName /v ComputerName /d %id% /f >nul 2>nul
reg add HKEY_LOCAL_MACHINESystemCurrentControlSetControlComputerNameActiveComputerName /v ComputerName /d %id% /f >nul 2>nul
reg add HKEY_LOCAL_MACHINESystemCurrentControlSetServicesTcpipParameters /v NV Hostname /d %id% /f >nul 2>nul
reg add HKEY_LOCAL_MACHINESystemCurrentControlSetServicesTcpipParameters /v Hostname /d %id% /f >nul 2>nul
reg add HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon /v AltDefaultDomainName /d %id% /f >nul 2>nul
reg delete HKEY_LOCAL_MACHINESOFTWAREMicrosoftSchedulingAgent /v OldName /f >nul 2>nul
nclick="copycode($('code0'));">復制代碼

請問有什么辦法讓%id%的值統(tǒng)一大小寫（例如我輸入ChInA，批處理輸出結(jié)果CHINA或者china）？