小编sof*_*ost的帖子

这个命令

echo "hello world" | awk '{split($0, array, " ")} END{print length(array) }'

对我不起作用并给出此错误消息

awk:第1行:对数组数组的非法引用

为什么？

看看这段代码:

#include <asio.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>

#include <iostream>
using namespace std;

class acceptor
{
private:
    asio::ip::tcp::acceptor * a;
    asio::io_service &_service;
    asio::ip::tcp::endpoint ep;
public:
    acceptor(asio::io_service &service, unsigned int port)
        :_service(service), ep(asio::ip::tcp::v4(), port)
    {
        try {
            a = new asio::ip::tcp::acceptor(service, ep);
        }
        catch (asio::system_error &e) {
            cout << e.what() << endl;
        }
        continueAccept();
    }

    ~acceptor() {
        delete a;
        cout << " destroy " << endl;
    }

    void continueAccept() {
        cout << "start accepting ..." << endl;
        boost::shared_ptr<asio::ip::tcp::socket> ptr(new asio::ip::tcp::socket(_service));
        a->async_accept(*ptr, boost::bind(&acceptor::handleAccept, …