shell趣味编程：求两数最大公因数

#!/bin/bash#read -p "please input 2 number: " var1 var2if [ $var1 -gt $var2 ];then    let var1=$var1+$var2     let var2=$var1-$var2    let var1=$var1-$var2filet chengji=$var1*$var2for((k=1;0<k;k++));do   let tmp=$var1*$k   if [ `bc <<< "$tmp%$var2"` -eq 0 ];then      let result=$chengji/$tmp      echo -n "result:"      echo $result      exit 0   fidone