我是地瓜

摘要： #!/bin/bash read -p "please Insert two integer values: " a b if [ ! -n "$a" -o ! -n "$b" ] then echo "please insert two values!" exit 1 fi expr 1 + $a &>/dev/null #整数加法 A=$? expr 1 + $b &>/dev/null ... 阅读全文