hi, firstly this is the text file that my program is currently reading

INPUT N1, N2, N3, N6, N7;
OUTPUT N22, N23;
WIRE N10, N11, N16, N19;
NAND NAND2_1 (N10, N1, N3);
NAND NAND2_2 (N11, N3, N6);
NAND NAND2_3 (N16, N2, N11);
NAND NAND2_4 (N19, N11, N7);
NAND NAND2_5 (N22, N10, N16);
NAND NAND2_6 (N23, N16, N19);
ENDMODULE
[download]

below is the code

#!/usr/bin/perl
use warnings;
use strict;
 
my $filename = 'c:\Users\aqids\Desktop\SCOAP\module.txt';
my $INPUT_DATA;
my @test_input_array;
 
open(FH, '<', $filename) or die "Cannot open file!";
 
while(<FH>)
{
    #READ MODULE NAME  
    my $MODULE_NAME = $_;
    my @test_input_array;
    if (defined($MODULE_NAME) && ($MODULE_NAME =~ /(MODULE \w+) /)) 
    {  
    my $module_name = $1;
    print "Module name = $module_name\n";  
    }
      
    #READ input N1,N2,N3,N6,N7;
    my $INPUT_DATA = $_;
    if (defined($INPUT_DATA) && ($INPUT_DATA =~ /INPUT (.*);/)) 
    {   
    my @input_array = split /,/, $1;
    @test_input_array = @input_array;
    my $size_input = @input_array;
    print "Primary input = ";  
    print scalar "@input_array\n"; 
    print "Number of primary input = $size_input\n"; 
    }  
    
    #READ output N22, N23;
    my $OUTPUT_DATA = $_;
    if (defined($OUTPUT_DATA) && ($OUTPUT_DATA =~ /OUTPUT (.*);/)) 
    {   
    my @output_array = split /,/, $1;
    my $size_output = @output_array;
    print "Primary output = ";  
    print scalar "@output_array\n"; 
    print "Number of primary output = $size_output\n"; 
    } 
    
    #READ wire N10, N11, N16, N19;
    my $WIRE_DATA = $_;
    if (defined($WIRE_DATA) && ($WIRE_DATA =~ /WIRE (.*);/)) 
    {   
    my @wire_array = split /,/, $1;
    my $size_wire = @wire_array;
    print "Wires = ";  
    print scalar "@wire_array\n"; 
    print "Number of wires = $size_wire\n\n"; 
    }
    
    my $gate_DATA = $_;
    if (defined($gate_DATA) && ($gate_DATA =~ /(.*) (.*) \((.*),(.*),(
+.*)\);/) && ($gate_DATA !~ /MODULE/) )    
    {
    my $gate_type = $1;
    my $gate_name = $2;
    my $gate_output = $3;
    my $input_A = $4;
    my $input_B = $5;
    
    print "Gate type = $gate_type\n";  
    print "Gate name  = $gate_name\n"; 
    print "Output = $gate_output\n"; 
    print "Input A = $input_A\n";
    print "Input B = $input_B\n";
    
    if (grep { $input_A eq $_ } @test_input_array) 
    {
        print "Yes\n";
        print "@test_input_array\n\n";
    } else 
    {
    print "No\n\n";
    }
        
    }
[download]

the problem right now is at....if (grep { $input_A eq $_ } @test_input_array)....as the reading for NAND2_1 should print out the first statement which is "Yes". However, it prints out No when it should be Yes. I am currently comparing the $input_A with INPUT N1, N2, N3, N6, N7. Meaning if $input_A contains any of the INPUT mention, it should print the first statement. Can someone help me fix it? Thanks.

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