关联数组实现性别统计

[root@server4 ~]# cat sex.txt
jack m
alice f
tom m
rose f
robin m

#!/usr/bin/bash
#count sex
#by racon 2022-04-22
declare -A sex

while read line
do
	type=`echo $line|awk '{print $2}'`
	let sex[$type]++
done < sex.txt

for i in ${!sex[@]}
do
	echo "$i: ${sex[$i]}"
done

运行结果如下：
[root@server4 ~]# ./count_sex.sh
f: 2
m: 3