awk 九九乘法表 ( awk 9x9 )

2021-07-03 modify / 2020-05-01

awk 九九乘法表  ( 9×9 table )

• 執行

   awk -f awk_m_table.awk 

  program : awk_m_table.awk

  # prg : awk_m_table.awk
   
  # url : http://www.polish.url.tw/ach5/ach5.html#awk
   
  BEGIN{ #←awk of Multiplication Table example
     printf " *    1  2  3  4  5  6  7  8  9\n";
     printf "---+--+--+--+--+--+--+--+--+---\n";
     for( i=1; i<=9; i++ ){
        printf "%2s |",i;
        for( j=1; j<=9; j++ ){
           array[i, j] = i * j;
           printf " %2s",array[i,j];
        }
        printf "\n";
     }
  }

• output

   *    1  2  3  4  5  6  7  8  9
  ---+--+--+--+--+--+--+--+--+---
   1 |  1  2  3  4  5  6  7  8  9
   2 |  2  4  6  8 10 12 14 16 18
   3 |  3  6  9 12 15 18 21 24 27
   4 |  4  8 12 16 20 24 28 32 36
   5 |  5 10 15 20 25 30 35 40 45
   6 |  6 12 18 24 30 36 42 48 54
   7 |  7 14 21 28 35 42 49 56 63
   8 |  8 16 24 32 40 48 56 64 72
   9 |  9 18 27 36 45 54 63 72 81

---

ref - http://www.polish.url.tw/ach5/ach5.html#awk