要求逆序输入两个线性表的内容，然后将两个线性表合为一个，然后删除相同的元素，正序打印出。
代码：
#include<stdio.h>
#include<stdlib.h>
#define listinitsize 100
#define OVERFLOW -1
typedef struct sqlist
{
    int *a;
    int length;
    int listsize;
}sqlist;
sqlist la,lb,lc;
/*线性表的定义*/
sqlist initlist()
{
    sqlist l;
    l.a=(int *)malloc(listinitsize*sizeof(int));
    if(!l.a) exit(OVERFLOW);
    l.length=0;
    l.listsize=listinitsize;
    return l;
}
void createlist(sqlist L,int num)
{
    int j;
    for(j=1;j<=num;j++)
    {
        scanf("%d",&L.a[j]);
        L.length++;
    }
}
/*合并两个线性表*/
sqlist addlist(sqlist la,sqlist lb,sqlist lc)
{
    int i=1,j=1,k=1;
    while(i<la.length&&j<lb.length)
    {
        if(la.a[i]<=lb.a[j])
        {
            lc.a[k]=lb.a[j];
            j++;
            k++;
        }
        else
        {
            lc.a[k]=la.a[i];
            i++;
            k++;
        }
    }
    while(i<=la.length)
    {
        lc.a[k]=la.a[i];
        k++;
        i++;
    }
    while(j<=lb.length)
    {
        lc.a[k]=lb.a[j];
        k++;
        j++;
    }
    lc.length=k-1;
    return lc;
}
/*输出线性表*/
void printlist(sqlist l)
{
    int i=1;
    for(i=1;i<=l.length;i++)
        printf("%6d",l.a[i]);
    printf("\n");
}
/*删除线性表中相同的元素*/
sqlist delsame(sqlist l)
{
    int i,j,k;
    if(l.length>0)
    {
        for(i=1;i<=l.length;i++)
        {for(j=i+1;j<=l.length;j++)
         if(l.a[j]==l.a[i])
         {
             for(k=j+1;k<=l.length;k++)
                 l.a[k-1]=l.a[k];
             l.length--;
         }
        }
    }
    return l;
}
/*将线性表逆序排列*/
sqlist change(sqlist l)
{
    int i,t;
    for(i=1;i<=l.length/2;i++)
    {
        t=l.a[i];
        l.a[i]=l.a[l.length-i];
        l.a[l.length-i]=t;
    }
    return l;
}
/*主函数*/
void main()
{
    int num,num0;
    la=initlist();
    la=initlist();
    lc=initlist();
    printf("please input thr numbers of you want to input La:");
    scanf("%d",&num);
    printf("\n");
    createlist(la,num);
    printf("please input the number of you want to input Lb:");
    scanf("%d",&num0);
    printf("\n");
    createlist(lb,num0);
    printf("The list of la:\n");
    printlist(la);
    printf("The list of lb:\n");
    printlist(lb);
    addlist(la,lb,lc);
    delsame(lc);
    change(lc);
    printf("The list of lc:\n");
    printlist(lc);
    getch();
}
最后输入的时候出现错误，请各位帮忙看看。