shell编程---实现九九乘法表（五种格式的乘法表）

野性酷女 2022-04-24 01:40 239阅读 0赞

要求如下图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70]  
效果图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70 1]  
源码：

appledeMacBook-Pro:~ apple$ cat 1607084207zy.sh
    for i in 1 2 3 4 5 6 7 8 9
    do
     for j in 1 2 3 4 5 6 7 8 9
      do
        printf "$i*$j=$(($i*$j))\t"
      done
      echo
    done
    
    appledeMacBook-Pro:~ apple$ cat 1607084207zy2.sh
    
    for i in 1 2 3 4 5 6 7 8 9
     do
      for((j=1;j<=i;j++))
       do 
        printf "$i*$j=$(($i*$j))\t"
       done
       echo
    done
    
    appledeMacBook-Pro:~ apple$ cat 1607084207zy3.sh
    
    for i in 1 2 3 4 5 6 7 8 9
    do 
     for((j=i;j<=9;j++))
      do
        printf "$i*$j=$(($i*$j))\t"
      done
      echo
    done
    
    appledeMacBook-Pro:~ apple$ cat 1607084207zy4.sh
    
    for i in 1 2 3 4 5 6 7 8 9
    do 
     for j in 9 8 7 6 5 4 3 2 1
     do
      if test $i -ge $j;
        then printf "$i*$j=$(($i*$j))\t"
      else
        printf "\t"
      fi
      done
      echo
    done
    
    appledeMacBook-Pro:~ apple$ cat 1607084207zy5.sh
     for i in 1 2 3 4 5 6 7 8 9
     do
      for j in 1 2 3 4 5 6 7 8 9
       do 
          if [ $i -le $j ];
            then printf "$i*$j=$(($i*$j))\t"
          else
            printf "\t"
          fi
      
       done
       echo
    done

总结：  
仍不能较熟练的使用echo显示内容，只能借助printf打印出制表符直线对齐，而用echo则不能实现效果。  
五种不同形式的乘法表就是遍历的条件不同

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70]: /images/20220221/0f66d16600674c38a88cd8e238a280b7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70 1]: /images/20220221/7c8a29a86ecb4ab2a102460b89668edb.png