Hi Monks, I have an input file which contains a student information as follow: 
stdNum  stdNam    stdLoc  stdAge  stdGrd
43      gorge     Brazil  28      A
12      John      FL      83      B+
66      Sam       Canada  43      C

[download]
What I need to do is to be able to update this file base on the user information let's say I want to delete student so I should be able to delete the whole line that contains the infromation about the student or if I want to only update somthing let's say the age. I am trying to do it by reading the file making the change and copying to another but don't seem to work for me . I am sure there is a better way to update the file than what I am doing .. Can someoen advice? here is an example of what I am doing : 

my $stdInfo="/home/stdInfo";

 print " Enter the number of student that you want to delete\n";
 my $std = <STDIN>;

 open(FILE, "$stdInfo") || die "couldn't open $stdInfo\n";
 open(FILECOPY, ">std") || die "couldn't open std\n";
 while(<FILE>) { chomp; next if ( $_ =~ /^#/ );
 if ($_ =~ /^$std/) {s/$_//;}
 print FILECOPY;
 }
system ( "mv std $stdInfo" );
  close(FILECOPY);
 close(FILE);

[download]
give me a funki output and doesn't update the file. thanks

In reply to updating Input file by Anonymous Monk

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