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#!/usr/bin/perl
use strict;
use warnings;
use 5.10.1;
sub _ask_input ($$) {
my ( $m, $n ) = @_;
die "\$M is not a postive number" unless $m >= 1;
die "\$N is not a postive number" unless $n >= 1;
my @rows = ();
ROW: for my $row ( 1 .. $m ) {
while (1) {
print "Enter values for row $row: ";
my $input = <STDIN>;
# Strip out everything that isn't a 0 or 1
$input =~ s/[^01]//g;
if ( length($input) != $n ) {
say "You must enter $n values. Please try again.";
}
else {
push @rows, [ split //, $input ];
next ROW;
}
}
}
return @rows;
}
sub main (@) {
my ( $M, $N ) = @_;
# Get the data from the user input
my @array = _ask_input( $M, $N );
# Determine which rows and columns have negative values
my @negative_cols = ();
my @negative_rows = ();
for my $r ( 0 .. $M - 1 ) {
for my $c ( 0 .. $N - 1 ) {
if ( $array[$r][$c] == 0 ) {
$negative_rows[$r] = 1;
$negative_cols[$c] = 1;
}
}
}
# Output the results
for my $r ( 0 .. $M - 1 ) {
my @row = ();
for my $c ( 0 .. $N - 1 ) {
push @row,
( $array[$r][$c]
and not $negative_rows[$r]
and not $negative_cols[$c] ) ? 1 : 0;
}
say '[ ' . join( ', ', @row ), ' ]';
}
}
main(@ARGV);
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