Write a csh shell automation script named compare.csh

Condition:

1. Consider there are 100 files. Within these files it is mentioned the volume x by y by x will xyz sqcm. Find this volume.
2. Compare your calculated volume with the mentioned volume.
3. If you see the difference between your calculation and the value of that file, then say ERROR otherwise say PERFECT
4. Final output shows in another file named output.txt