顺序表实现代码

#include<iostream>
using namespace std;

typedef int ElemType;
const int N = 80;

struct SqList
{
    ElemType *elem;
        int length;
        void Init();
        void Clear();
        int Locate(ElemType e);
        void Insertbefore(int i, ElemType e);
        void Delete(int i, ElemType &e);
        bool Empty();
        void Travese();
};

int main()
{
    SqList L;
    L.Init();

    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        ElemType t;
        cin >> t;
        L.Insertbefore(i + 1, t);
    }
    L.Travese();
    cout<<endl;
    cout << L.Empty() << endl;

    ElemType m;
    cin >> m;
    cout << L.Locate(m) << endl;

    L.Delete(3, m);//删除位序为3的元素，放到m里面；
    cout<<m<<endl; 
    L.Travese();

    L.Clear();




}


void SqList::Init()
{
    elem = new ElemType[N];
    length = 0;
}


void SqList::Clear()
{
    length = 0;
}


bool SqList::Empty()
{
    return length==0;
}

void SqList::Insertbefore(int i, ElemType e)
{
    if (i<1 || i>length + 1) return;
    for (int j = length - 1; j >= i - 1; j--)
    {
        elem[j + 1] = elem[j];//插入位置及其之后元素右移        
    }
    elem[i - 1] = e;
    length++;
}

void SqList::Delete(int i, ElemType &e)
{
    if (i<1 || i>length) return;
    e = elem[i - 1];
    for (int j = i; j <= length - 1; j++) 
        elem[j - 1] = elem[j];
    length--;
}

void SqList::Travese()
{
    for (int i = 0; i < length; i++)
    {
        if (i > 0) cout << " ";
        cout << elem[i];
    }
}

int SqList::Locate(ElemType e)
{
    int i = 1;
    while (i <= length && elem[i - 1] != e)
    {
        i++;
    }


    if (i <=length) return i;
    else return 0;
}