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Awk Script Problem

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# 1  
Old 08-03-2011
Awk Script Problem
Can someone please explain to me what is wrong with this awk script?

Code:
echo 74 85 | awk '{
                                if ( $1 > $2 ) PRESULTS = ( $1 - $2 );
                                print $0,"=>","P"PRESULTS ;
                               else if  ( $1 > $2 ) NRESULTS = ( $2 - $1 );
                                print $0,"=>","N"NRESULTS ;
                               else if  ( $1 = $2 ) SRESULTS = ( $1 );
                                print $0,"=>","S"SRESULTS ;
                                }'

I want the bolded to be calculated IF ONLY the conditions are met. And then at the end i want the results of the calculations to be outputted out with either a P, N, or S prefixing it.

But its not working.
# 2  
Old 08-03-2011
Commas after "P", "S" and "N" ?
Code:
echo 74 85 | awk '{
                                if ( $1 > $2 ){
                                        PRESULTS = ( $1 - $2 );
                                        print $0,"=>","P",PRESULTS ;
                                } else {
                                        if ( $1 < $2 ){
                                                NRESULTS = ( $2 - $1 );
                                                print $0,"=>","N",NRESULTS ;
                                        } else {
                                                SRESULTS = ( $1 );
                                                print $0,"=>","S",SRESULTS
                                        }
                                }
                        }'
74 85 => N 11

Last edited by DGPickett; 08-03-2011 at 04:44 PM..
# 3  
Old 08-03-2011
how about changing the > operator in your second test to < ??
# 4  
Old 08-03-2011
Not to mention == for comparison and = for assignment, welcome to C-ish world, but no check is better !
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