找了一晚上bug终于好了

#include "stdio.h"
#include "conio.h"
# include "malloc.h"
#define maxsize 1000
#pragma warning(disable:4996)；
typedef char datatype;
typedef struct
{
    datatype data[maxsize];     /*定义线性表为一个向量*/
    int last;
} sequenlist;
/* 插入函数*/
int insert(sequenlist* L, char x, int i)     /*将新结点X插入到表L的第I个位置*/
             /*L为指向线性表sequenlist类型的指针变量*/
{
    int j;
    if ((*L).last == maxsize - 1)
    {
        printf("overflow\n");
        return  0;
    }
    else
        if ((i < 1) || (i > (*L).last + 1))
        {
            printf("error\n");       /* 非法位置*/
            return  0;
        }
        else
        {
            for (j = (*L).last; j >= i - 1; j--)
                ;
            ;
            ;
        }
    return (1);
}

/* 删除函数*/

//int delete(sequenlist  *L, int i)        /*从表中删除第I个结点*/
int dellist(sequenlist* L, int i)
{
    int j;
    if ((i < 1) || (i > (*L).last + 1))           /* 非法位置*/
    {
        printf("error\n");
        return 0;
    }
    else
    {
        for (j = i; j <= (*L).last; j++)
            L->data[i ] = L->data[i + 1];
          L->last  = L->last - 1;
        return (1);
    }
}

/* 生成线性表*/
void creatlist(sequenlist* L)
{
    int i, j, n;
    printf(" input the number of the data\n");        /*输入N个数据*/
    scanf("%d", &n);
    for (i = 0; i < n; i++)
    {
        printf("data[%d]=", i);
        getchar();
        scanf("%c", &(*L).data[i]);
    }
    (*L).last = n - 1;
    printf("\n");
}

/* 输出线性表*/
void printout(sequenlist* L)
{
    int i;
    for (i = 0; i <= (*L).last; i++)
    {
        printf(" data[%d]=", i);
        printf(" %c ", (*L).data[i]);
    }
}
int main()
{
    sequenlist* L;
    char cmd, x;
    int i, s;
    L = (sequenlist*)malloc(sizeof(sequenlist));
    creatlist(L);
    printout(L);

    do
    {
        printf(" i , I  -----------insert\n");
        printf(" d , D -----------delete\n");
        printf(" q , Q -----------exit\n");
        do
        {
            fflush(stdin);
            scanf("%c", &cmd);
        } while ((cmd != 'd') && (cmd != 'D') && (cmd != 'I') && (cmd != 'i') && (cmd != 'q') && (cmd != 'Q'));
        switch (cmd)
        {
        case  'i':
        case  'I': {
            printf("please enter the data which you will insert:");
            fflush(stdin);
            scanf("%c", &x);
            printf("please enter the location which you want to insert:");
            scanf("%d", &i);
            insert(L, x, i);
            printout(L);
            break;
        }
        case  'd':
        case  'D': {
            printf("please enter the location which you want delete:");
            getchar();
            scanf("%d", &i);
            dellist( L,i);
            printout(L);
            break;
        }
        }
    } while ((cmd != 'q') && (cmd != 'Q'));
    getchar();
}