#!/usr/bin/perl
use warnings;
use strict;

my $code = *DATA;

my %data = (24 => 'temperature',
            25 => 'pressure',
            26 => 'humidity',
           );

my %nums = ( 24 => ": information1\n",
             25 => ": information2 \n",
             26 => ": information3 \n",
           );

%data = reverse %data;
my $test_string = '(' . join("|", keys %data) . ')' ;

while (<$code>){
    if (/$test_string/) {
        chomp;
        $_ .= $nums{$data{$1}};
    }
    print;
}

__DATA__
/*!
*****************************************************************************
* * $b Description: Pressure Valve high
****************************************************************************/
#include "ccode.h"
/****************************************************************************/
/* Local function prototypes (static): */
void main_10ms(void)
{
temperature ( i need to add infomation before  string that found)
if {.....
......
if{........
.....
}else
{......
}
}
humidity( i need to add infomation before  string that found)
if {.....
......
if{........
.....
}else
{......
}
}