Here is the data and code:- 
create_clock -name ldtclock -period 60 
create_clock -name mxuclock -period 20 

set_input_clock 50 -rise -clock "ldtclock" \
find(port,"mxi_port")

set_input_clock 40 -fall -clock "mxuclock"\
find(port,"mxu_port")

[download]
so if set_input_clock is 40 but the clock is 20 so I have to make it 0. 
while(<file>)
{
if (/create_clock\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)*/ )  {

            $CLK1{$2}= $4;
            print clk_file ;
            
elsif (/set_input_clock\s+(\d+)\s+(\S+)\s+(\S+)\s+\"(\w+)\"\s+(\S+)*/ 
+) 
       { 
         $d =$1;
         $c =$4; 
         if ($delay < 0) {

print clk_file "set_input_clock 0 $2   $3 $4  $5 \n";
        next;
     }
         if (exists $CLK{$c}) 
     {
           if ($CLK{$c}*0.95 < $d) 
        {
           printf clk_file "set_input_clock %.6f $2   $3 $4  $5 \n",$C
+LK{$c}*0.5;
        }
       else{print clk_file;}
        
         }

[download]

In reply to Re: Problem matching a backslash in a regular expression by perlnewbie05
in thread Problem matching a backslash in a regular expression by perlnewbie05

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