操作命令

init_stack  name      # 初始化
push_stack  name data # 進棧操作
pop_stack   name      # 出棧操作
print_stack name      # 輸出棧中內容

實際程式碼

function init_stack() {
    eval "$1"_length=0
}

function push_stack() {
    eval eval "$1"_"\${${1}_length}"="$2"
    eval eval "$1"_length="\$(( "$1"_length + 1 ))"
 

}

function pop_stack() {
    eval "$1"_length="\$(( "$1"_length - 1 ))"
    eval eval echo \\\$"$1""_\${${1}_length}"
}

function print_stack() {
    echo -n "["
    eval length="\${${1}_length}"
    i=0
    while test $i -lt $length
    do
        test $i != 0 && echo -n ", "
        eval echo
 
 -n "\$${1}_${i}"
        i=$(( i + 1 ))
    done
    echo "]"
}