shell 求总分

 求总分并且输出：
 文件a.txt
 学号  姓名    性别     年龄
   张三    男
   赵四    男
   李丽    女
 文件b.txt
 学号   语文   数学   英语

 方法1：
 #!/bin/sh
 paste a.txt b.txt ccc.txt
 cat ccc.txt |awk 'NR==1{ printf "%10s %10s %10s %10s %10s %10s %10s\n",$1,$2,$3,$6,$7,$8,"总分"}NR>=2{{zongfen=$6+$7+$8}{printf "%10s %10s %10s %10s  %10s %10s %10s\n",$1,$2,$3,$6,$7,$8,zongfen}}'

 方法2：
 #!/bin/sh
  for i in `cat aa.txt |awk '{ print $1}'`
  do
         a=`grep $i aa.txt |awk '{print $1}'`
         b=`grep $i aa.txt |awk '{print $2}'`
         c=`grep $i aa.txt |awk '{print $3}'`
         d=`grep $i aa.txt |awk '{print $4}'`
         e=`grep $i bb.txt |awk '{print $2}'`
     f=`grep $i bb.txt |awk '{print $3}'`
     g=`grep $i bb.txt |awk '{print $4}'`
         if [ $a != "学号" ]
         then
                 sum=`grep $i bb.txt |awk '{$5=$2+$3+$4;print $5 }'`
                 echo  $a"\t" $b"\t"  $c"\t" $d"\t" "$e\t"  "$f\t" $g"\t"   $sum"\t"
         else
                 echo $a"\t" $b"\t"  $c"\t" $d"\t" $e"\t"  $f"\t" $g"\t"   "总分""\t"
         fi
  done