數(shù)據(jù)結(jié)構(gòu)的問題相當(dāng)重要，如果你能描述出一個(gè)問題的輸入和輸出數(shù)據(jù)結(jié)構(gòu)，那么這個(gè)問題就大有希望，數(shù)據(jù)結(jié)構(gòu)并不是C語言的專利，真正的數(shù)據(jù)結(jié)構(gòu)是偽代碼的。下面這個(gè)棧類是我以前搜集別人的代碼，實(shí)際上每當(dāng)考慮一個(gè)程序問題的時(shí)候，尤其是復(fù)雜的程序，就應(yīng)該想到，用什么樣的數(shù)據(jù)去描述你的輸入和輸出。

'**********************************************
'        vbs棧類
'        push(string)進(jìn)棧
'        getTop取棧頂元素
'        pop去掉棧頂元素
'        isempty是否?？?
'        isfull是否棧滿(pMax設(shè)置了大小，可自行修改)
'
'        木鳥  2002.10.10
'        http://www.aspsky.net/
'**********************************************

class Stack
        private pArr, pString, pMax
        private tab
        private sub class_initialize()
                tab=chr(9)
                pMax=1000        '最大容量
        end sub
        private sub class_terminate()
                if isarray(pArr) then
                        erase pArr
                end if
        end sub

        public function push(str)
                if str<>"" and instr(str,tab)<1 and not Isfull then
                        if isarray(pArr) then
                                pString=join(pArr,tab)
                        end if
                        pString=pString & tab & str
                        pArr=split(pString,tab)
                        push=true
                else
                        push=false
                end if
        end function

        public function GetTop()
                if not isarray(pArr)<0 then
                        GetTop=null
                else
                        if ubound(pArr)<0 then
                                GetTop=null
                        else
                                GetTop=pArr(Ubound(pArr))
                        end if
                end if
        end function

        public function Pop()
                if not isArray(pArr) then
                        Pop=false
                else
                        if Ubound(pArr)<0 then
                                Pop=false
                        else
                                pString=join(pArr,tab)
                                pString=left(pString,inStrRev(pString,tab)-1)
                                pArr=split(pString,tab)
                                Pop=true
                        end if
                end if
        end function

        public function Isempty()
                 if not isArray(pArr) then
                         Isempty=true
                 else
                         if Ubound(pArr)<0 then
                                 isempty=true
                         else
                                 isempty=false
                         end if
                 end if
        end function

        public function Isfull()
                if not isArray(pArr) then
                        Isfull=false
                else
                        if ubound(pArr)<pMax then
                                Isfull=false
                        else
                                Isfull=true
                        end if
                end if
        end function
end class

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