Okay...I have no idea what's wrong here. I've been working on this forever, and can't find a solution to my problem. Oddly, my program follows my teacher's syntax flawlessly. Can any of you guys figure out what's wrong? Here's the program: 
open (INPUT, "-Tscore.dat") || die "Cannot open input file.\n";
open (OUTPUT, ">L7AOUT.txt") || die "Cannot open file.\n";
read (INPUT, $studentname, 20);
read (INPUT, $test1, 3);
read (INPUT, $test2, 3);
read (INPUT, $test3, 3);
read (INPUT, $test4, 3);
$studentname3 = substr ($studentname, 0, 3);

print OUTPUT "      CLASS TEST AVERAGES\n\n";
print OUTPUT "                          TEST\n";
print OUTPUT "NAME OF STUDENT         AVERAGE\n\n";

while ($studentname3 ne "END")
{
$avg = ($test1 + $test2 + $test3 + $test4) / 4;
$studnum = $studnum + 1;
$totavg = $totavg + $avg;
printf OUTPUT ("%-24.20s %6.2f", $studentname, $avg);
print OUTPUT "\n\n";
read (INPUT, $name, 20);
read (INPUT, $test1, 3);
read (INPUT, $test2, 3);
read (INPUT, $test3, 3);
read (INPUT, $test4, 3);
$studentname3 = substr ($studentname, 0, 3);
}
$totavg = $totavg / $studnum;
print "\n\n";
printf OUTPUT ("%-25.22s %6.2f", $studnum, $totavg);
print "Program completed Successfully.";
close INPUT;
close OUTPUT;
exit 0;

[download]
Here's "Tscore.dat": 
Tom Thumb           100096093098
Mickey Mouse        088068095086
Minnie Mouse        078056088098
Donald Duck         098096078100
Tad Pole            100100100100
Mack Aroni          095067089098
Cassie Role         082045088079
Mary Martin         085096093088
Mickey Mantle       088063095086
Darryl Strawberry   078056098098
Donald Trump        098086078100
Steve Young         100078097093
Mack Truck          095067099098
Mel Gibson          082075088079
END                 000000000000

[download]
Here's my Output: 
     CLASS TEST AVERAGES

                          TEST
NAME OF STUDENT         AVERAGE

Tom Thumb                 96.75


Mickey Mouse            532.75

6
Minnie Mouse           555.00

98
Donald Duck            68.00

100
Tad Pole               7.50

0100
Mack Aroni          405.00

89098
Cassie Role         31.75

088079
Mary Martin       129.25

6093088
Mickey Mantl     220.00

63095086
Darryl Stra      19.50

056098098
Donald Tru       2.25

8086078100
Steve You       0.25

00078097093
Mack Tru       0.00

095067099098
Mel Gib       0.00

 082075088079
END          0.00

  000000000000
            0.00

                           0.00

                           0.00

                           0.00

                           0.00

                           0.00

[download]
...The 0s continue onwards towards infinty...

Any help would be very much appreciated.
My final in this class is at noon. :|

In reply to I'm having a strange bug with basic file input. I'm a total newb. by KingCupons

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