remove ;(semi colon)

use header #include <windows.h> [edit]
and syntax example:
DeleteFile(TEXT("datafile.txt"));

its for vc++;

see following example it may help you:

char chStr[10][10];

//populate array with strings
for(int i=0;i<10;i++)
{
strcpy(chStr[i],"hi");
}
//print the strings

use
DeleteFile (http://msdn2.microsoft.com/en-us/library/aa363915.aspx)

after getting all the filename along with path u need to use String object's (search pattern to get) subString method to get file name.