size_t nKnowledgeBaseSize = sizeof(KnowledgeBase)/sizeof(KnowledgeBase[0]);

record* find_match(char*  input) {
    for(int i = 0; i < nKnowledgeBaseSize;  ++i) {
        if( !stricmp( KnowledgeBase[i].input, input ) )
            return &KnowledgeBase[i];
    }
    return NULL;
}

void chatterbot2()
{
    srand((unsigned) time(NULL));

    char sInput[20] = {0};
    char* sResponse = NULL;

    while(1) {
        printf("我：");
        scanf("%19[^\n]", &sInput);
        fflush(stdin);

        record* responses = find_match(sInput);
        if(sInput == "BYE") {
            printf("和你聊天太愉快了，下次再来！\n");
            _sleep(1000);
            break;
        }
        else if( !responses )  {
            printf("我，我，我不确定我是否能理解你说的是什么 ...\n");
        }
        else {
            int nSelection = rand()  % MAX_RESP;
            sResponse = responses->responses[nSelection];
            printf("%s\n", sResponse);
        }
    }
}


int main()
{
   
    chatterbot2();
    return 0;
}