#include <stdio.h>
#include <memory.h>
#include <ctype.h>

int main( int argc, char *argv[] )
{
    FILE *pFile = NULL;
    long iAddr = 0;
    char szBuf[16];
    char szAsc[17];
    int i, n;

    if ( argc == 2 )
		pFile = fopen( argv[1], "r" );

    if ( !pFile )
    {
		perror( argv[1] );
		return 1;
    }

    while( !feof(pFile) )
    {
        printf( "%08lx ", (long)iAddr );

		n = fread( szBuf, 1, 16, pFile );

        for( i=0 ; i<n ; i++ )
        {
		    printf( "%02x ", szBuf[i] & 0xff );
		}

	    for( i=n ; i<16 ; i++ )
        {
			printf( "   " );
		}

		printf( "  " );

		memset( szAsc, ' ', 16 );
        for( i=0 ; i<n ; i++ )
        {
            if ( isprint(szBuf[i]) )
				szAsc[i] = szBuf[i];
            else
				szAsc[i] = '.';
		}
		szAsc[16] = '\0';

		printf( "%s\n", szAsc );

		iAddr += 16;
    }

    fclose( pFile );
    return 0;
}