问利用数学成绩使用awk命令查找记录

EN

awk '
BEGIN{
  FS=","
  OFS="|"
}
FNR==1{
  for(i=1;i<=NF;i++){
    if($i=="math_marks"){ field=i }
  }
  next
}
{
  for(i=3;i<=(NF-1);i++){
    max=(max>$i?(max?max:$i):$i)
  }
  if(max==$field && $field>80){ $1=$1; print }
  max=""
}
'  Input_file

awk '                                               ##Starting awk program from here.
BEGIN{                                              ##Starting BEGIN section of code here.
  FS=","                                            ##Setting field separator as comma here.
  OFS="|"                                           ##Setting output field separator as | here for all lines.
}
FNR==1{                                             ##Checking condition if its first line then do following.
  for(i=1;i<=NF;i++){                               ##Going through all fields here.
    if($i=="math_marks"){ field=i }                 ##Checking if a field value is math_marks then set field to tht field numner here.
  }
  next                                              ##next will skip all further statements from here.
}
{
  for(i=3;i<=(NF-1);i++){                           ##Going through from 3rd field to 2nd last field here.
    max=(max>$i?(max?max:$i):$i)                    ##Creating max variable which checks its value with current field and sets maximum value by comparison here.
  }
  if(max==$field && $field>80){ $1=$1; print }      ##After processing of all fields checking if maximum and field value is equal AND math number field is greater than 80 then print the line.
  max=""                                            ##Nullifying max var here.
}
'  Input_file                                       ##Mentioning Input_file name here.

                        here
                        | |
                        v v
$ busybox awk 'BEGIN{FS=”,” ; OFS="|"} {if($4<$5 && $5>80){print $1,$2,$3,$4,$5,$6}}'
awk: cmd. line:1: Unexpected token