题解 | #求平均值#

01.AC的Shell

#!/bin/bash
read loop
sum=0 
count=0
for ((i = 0; i < $loop; ++i)) 
do 
    read temp
    ((sum+=temp))
    ((++count))
done
echo "scale=3;$sum/$count" | bc

02.差点AC的shell

• 问题出在最后一行

  #!/bin/bash
  read loop
  sum=0 
  count=0
  for ((i = 0; i < $loop; ++i)) 
  do 
    read temp
    ((sum+=temp))
    ((++count))
  done
  echo "scale=3;$sum/$count" 

03.修改原先AC代码

• 谢谢牛油@xxxxw 指出该处loop

#!/bin/bash
read loop
sum=0 
for ((i = 0; i < $loop; ++i)) 
do 
    read temp
    ((sum+=temp))
done
echo "scale=3;$sum/$loop" | bc