关于线性表的问题，为什么什么都输不出来，求指点

Question

 #include<iostream>
using namespace std;

#define size 20
#define stepsize 10

struct array
{
    int* spot;//数组的名字
    int curlen;//数组的当前长度
    int arraylen;//数组存储空间的长度
};

void initarray(array* p)//数组的初始化
{
    p->spot = new int[size];
    p->curlen = 0;
    p->arraylen = size;
}


void output(array p)
{
    cout << "当前数组的长度为：" << p.curlen << endl;
    cout << "当前数组的内存空间为：" << p.arraylen << endl;
    if (p.curlen != 0)
    {
        cout << "该数组的内容为：";
        for (int i = 0; i < p.curlen; i++)
        {
            cout <<p. spot[i] << ",";
        }
        cout << endl;
    }
}

void insert(array* p,int pos,int value)
{
    if ((pos<0) || (pos>p->curlen))
    {
        cout << "插入的位置有错误" << endl;
    }
    else
    if ((p->curlen + 1) < p->arraylen)//判断是否越界
    {
        int* temp = new int[p->arraylen + stepsize];
        for (int l = 0; l < p->curlen; l++)
        {
            temp[l] = p->spot[l];
        }
        delete[]p->spot;
    }
    else
    {
        int i, j;
        j = p->curlen+1;
        i = j - 1;
        for (int k = 0; k < p->curlen - pos + 1; k++,i--,j--)
        {
            p->spot[j] = p->spot[i];
        }
        p->spot[i] = value;
        p->curlen++;
    }
}
int main()
{
    array myarray;
    initarray(&myarray);
    output(myarray);
    for (int i = 0; i < 5; i++)
    {
        insert(&myarray, 0, i);
    }
    output(myarray);

    cout << endl;
    return 0;
}

Answer 1

https://zhidao.baidu.com/question/407203273.html