线性表的插入操作

int insert(Vec *v,int idx,int val) {
    if (!v)  return 0;
    if (idx<0||idx>v->len )return 0;
    if (v->len == v->size)return 0;
    memcpy(v->data +idx+1,v->data +idx,sizeof(int)*(v->len -idx));
    v->data[idx] = val;
    v->len++;
    return 1;
}

线性表的删除

int erase(Vec*v,int idx) {
    if (!v)return 0;
    if (idx < 0 || idx >= v->len)return 0;
    memcpy(v->data +idx,v->data+idx+1,sizeof(int)*(v->len-idx-1));
    v->len--;
    return -1;
}