How do I find out the storage capa开发者_如何转开发city of my harddisk without using the OS functions like dir or ls?
On windows:
Win32: GetDiskFreeSpaceEx
.NET: DriveInfo
If, for whatever reason, you still don't want to use those, you can send an IOCTL message direct to the disk driver.
statfs() unix system call is your friend (link points to BSD man page as used in Mac OS X).
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It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
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