线性表的插入和删除，，遇到麻烦了，望大仙解决，嘿嘿。。。。。

#include <iostream>
#include <stdlib.h>
using namespace std;

#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2

#define LIST_INIT_SIZE 10
#define LISTINCREMENT 10

typedef int elemtype;

typedef struct
{
    elemtype *elem;
    int length;
    int list_size;
}sqlist;

//构造空的线性表
elemtype init_list_sq(sqlist &list)
{
    list.elem = (elemtype*)malloc(LIST_INIT_SIZE*sizeof(elemtype));
    if(!list.elem)
       exit(OVERFLOW);
    list.length = 0;
    list.list_size = LIST_INIT_SIZE;
    return OK;
}//


//在表list中第i个位置插入元素e
elemtype list_insert_sq(sqlist &list, int i, elemtype e)
{
    //在顺序表list的第i个位置插入元素e
    //i的合法位置为1到list_length-1
    if(i<1 || i>list.length+1)
        return ERROR;
    if(list.length>=list.list_size)
    {
        elemtype *newbase=(elemtype *)realloc(list.elem, (list.list_size+LISTINCREMENT)*sizeof(elemtype));
        if(!newbase)
            exit(OVERFLOW);
        list.elem = newbase;
        list.list_size += LISTINCREMENT;
    }
    elemtype *q = &list.elem[i-1];
    elemtype *p = NULL;
    for(p=&(list.elem[list.length-1]); p>=q; --p)
    {
        *(p+1) = *p;
    }
    *q = e;
    ++list.length;
    cout<<"插入成功!"<<endl;
    return OK;
}//

//删除list表中第i个元素e
elemtype list_delete_sq(sqlist &list, int i, elemtype &e)
{
    //删除元素的合法位置1<=i&&i<=list.length
    if(i<1&&i>list.length)
        return ERROR;
    elemtype *p = &(list.elem[i-1]);
    e = *p;
    elemtype *q = &list.elem[list.length - 1];
    for(++p; p<=q; ++p)
    {
        *(p-1) = *p;
    }
    --list.length;
    return OK;
}//
void OutPut(sqlist list)
{
    for(int i=0;i<list.length;i++)
    {
        cout<<list.elem[i]<<endl;
    }
}

int main(int argc, char *argv[])
{
    sqlist sq_list;
    init_list_sq(sq_list);
    int i=1;
    do
    {
        
        int elem = 0;
        cout<<"Input the elem you want (or Input 1111 to exit!): ";
        cin>>elem;
        if(elem==1111)
            break;
        list_insert_sq(sq_list, i, elem);
        ++i;
    }while(TRUE);
    OutPut(sq_list);
    return 0;
}