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C/C++ code:

#include <windows.h>
#include <stdio.h>

void main()
{
ULARGE_INTEGER ulfreeBytesAvailable;
ULARGE_INTEGER ulTotalNumberOfBytes;
ULARGE_INTEGER ulTotalNumberOfFreeBytes;

if(GetDiskFreeSpaceEx(TEXT("C:\\"),&ulfreeBytesAvailable,
&ulTotalNumberOfBytes,&ulTotalNumberOfFreeBytes))
{
double d = (ulfreeBytesAvailable.QuadPart)/1024.0/1024.0/1024.0;
printf("free =%lfG",d);
}
}



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#include <windows.h>
#include <stdio.h>


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