8.2 �T���v��

• �s�������t�����D

  {
  	printf("%d,%s\n", NR, $0 );
  }
  

     �K�\����  2500
     �P�[�X   200
     �d�����@ 1200
  

  % gawk -f numbering.awk dat1.txt
  1,   �K�\����  2500
  2,   �P�[�X   200
  3,   �d�����@ 1200
  

• �s����������

  % gawk -f reverse.awk dat1.txt
     �d�����@ 1200
     �P�[�X   200
     �K�\����  2500
  

  {
    DATA[NR] = $0;
  }
  END {
    for ( i = NR; i > 0; i-- ) {
  	printf( "%s\n", DATA[i] );
    }
  }
  

• �W�v

  BEGIN {
    SUM = 0.0;
  }
  {
    SUM = SUM + $2;
    printf("%10s %7.0d\n", $1, $2);
  }
  END {
    printf( "------------------\n", SUM);
    printf( "%10s %7.0d\n", "���v", SUM);
  }
  

  % gawk -f sum.awk dat1.txt
    �K�\����    2500
      �P�[�X     200
    �d�����@    1200
  ------------------
        ���v    3900