Merge pull request #4485 from Cris-HD/branch-for-challenge-120

Added challenge 120 solution

1 files changed, 57 insertions, 0 deletions

diff --git a/challenge-120/cristian-heredia/perl/ch_1.pl b/challenge-120/cristian-heredia/perl/ch_1.pl
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+=begin
+    TASK #1 › Swap Odd/Even bits
+    Submitted by: Mohammad S Anwar
+    You are given a positive integer $N less than or equal to 255.
+
+    Write a script to swap the odd positioned bit with even positioned bit and print the decimal equivalent of the new binary representation.
+
+    Example
+    Input: $N = 101
+    Output: 154
+
+    Binary representation of the given number is 01 10 01 01.
+    The new binary representation after the odd/even swap is 10 01 10 10.
+    The decimal equivalent of 10011010 is 154.
+
+    Input: $N = 18
+    Output: 33
+
+    Binary representation of the given number is 00 01 00 10.
+    The new binary representation after the odd/even swap is 00 10 00 01.
+    The decimal equivalent of 100001 is 33.
+
+=end
+=cut 
+
+use warnings;
+use strict;
+use Data::Dumper;
+    
+my $N = 101;
+my @bits;
+my $newNumber = '';
+
+splitBinary();
+
+
+sub splitBinary {
+    @bits = split(//, sprintf ("%b", $N));
+    if (@bits % 2 != 0){
+        unshift @bits, '0';
+    }
+    swapNumbers();
+}
+
+sub swapNumbers {
+    foreach(my $i=0;$i<@bits;$i+=2){
+        $newNumber = $newNumber.$bits[$i+1].$bits[$i];
+    }
+    convertDecimal();
+}
+
+sub convertDecimal {
+    my $result = eval("0b$newNumber");
+    print("Output: $result");
+}
+
+