编写shell脚本以打印菱形图 [英] Write a shell script to print a diamond figure

问题描述

这是家庭作业，并不是要欺骗任何人，但我没有在原始帖子中对此进行详细说明.

This is homework, didn't mean to trick anybody, but I didn't specify that in my original post.

写一个shell脚本来打印下图(不要硬编码).

Write a shell script to print the following figure (Do not hardcode).

http://cl.ly/1K0C1b2x3W2N3o3m1Y2y

推荐答案

一方面，我不喜欢给出答案.另一方面，我认为我已经使这个问题变得非常复杂，以至于试图弄清楚它的工作方式可能具有一定的教育价值.祝你好运！

On the one hand, I don't like to just give out an answer. On the other hand, I think I've made this sufficiently convoluted that, perhaps, there is some educational value in trying to figure out how it works. Good luck!

#!/bin/sh 

while i=$( expr ${i-0} ${op-+} 1 ); do
    j=$i
    t=$( expr 2 \* $i - 1 )
    printf %$( expr \( $( expr 2 \* ${1-6} - 1 ) - $t \) / 2 )s
    while test $(( j-- )) -gt 0; do printf '* '; done
    echo
    test $i = ${1-6} && op=-
done

这是一个不错的变体:

#!/bin/sh

while i=$( expr ${i-0} ${op-+} 1 ); do
    printf %$( expr $(( 2 * $(( ${1-6} - $i )) )) / 2 )s
    printf \*%$(( $i - 1 ))s | sed 's/ / */g'
    test $i = ${1-6} && op=-
done

这篇关于编写shell脚本以打印菱形图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！