#include <windows.h>
#include <utility.h>
#include <ansi_c.h>


char szDrive[10];
unsigned long nuSectorsPerCluster;
unsigned long nuBytesPerSector;
unsigned long nuNumberOfFreeClusters;
unsigned long nuTotalNumberOfClusters;
BOOL cStat;


void main(void) {
	Cls();
	printf("Enter the drive letter to find its available disk space\n"
		"(for example: c:) -- ");
	gets(szDrive);

	cStat = GetDiskFreeSpace(szDrive, &nuSectorsPerCluster,
				&nuBytesPerSector, &nuNumberOfFreeClusters,
				&nuTotalNumberOfClusters);

	if (cStat) {
		printf("Available space is: %.2f megs",
			nuNumberOfFreeClusters*nuSectorsPerCluster*nuBytesPerSector/(1024.0*1024.0)
		);
	}
	else printf("Invalid drive!\n");
}